diff --git a/src/helper/internet-stack-helper.cc b/src/helper/internet-stack-helper.cc
index 23ee1a5d8..212e34109 100644
--- a/src/helper/internet-stack-helper.cc
+++ b/src/helper/internet-stack-helper.cc
@@ -179,15 +179,17 @@ std::string InternetStackHelper::m_pcapBaseFilename;
 bool InternetStackHelper::m_isInitialized = false;
 
 InternetStackHelper::InternetStackHelper ()
-  : m_ipv4Enabled (true),
+  : m_routing (0),
+  m_routingv6 (0),
+  m_ipv4Enabled (true),
   m_ipv6Enabled (true)
 {
   SetTcp ("ns3::TcpL4Protocol");
-  static Ipv4StaticRoutingHelper staticRouting;
-  static Ipv4GlobalRoutingHelper globalRouting;
-  static Ipv4ListRoutingHelper listRouting;
-  static Ipv6ListRoutingHelper listRoutingv6;
-  static Ipv6StaticRoutingHelper staticRoutingv6;
+  Ipv4StaticRoutingHelper staticRouting;
+  Ipv4GlobalRoutingHelper globalRouting;
+  Ipv4ListRoutingHelper listRouting;
+  Ipv6ListRoutingHelper listRoutingv6;
+  Ipv6StaticRoutingHelper staticRoutingv6;
   if (m_isInitialized == false)
     {
       // Only add these once
@@ -203,16 +205,24 @@ InternetStackHelper::InternetStackHelper ()
   SetRoutingHelper (listRoutingv6);
 }
 
+InternetStackHelper::~InternetStackHelper ()
+{
+  delete m_routing;
+  delete m_routingv6;
+}
+
 void 
 InternetStackHelper::SetRoutingHelper (const Ipv4RoutingHelper &routing)
 {
-  m_routing = &routing;
+  delete m_routing;
+  m_routing = routing.Copy ();
 }
 
 void
 InternetStackHelper::SetRoutingHelper (const Ipv6RoutingHelper &routing)
 {
-  m_routingv6 = &routing;
+  delete m_routingv6;
+  m_routingv6 = routing.Copy ();
 }
 
 void
diff --git a/src/helper/internet-stack-helper.h b/src/helper/internet-stack-helper.h
index ff96d22d2..5c8bc32e6 100644
--- a/src/helper/internet-stack-helper.h
+++ b/src/helper/internet-stack-helper.h
@@ -53,6 +53,7 @@ public:
    * such as ns3::OlsrHelper
    */
   InternetStackHelper(void);
+  virtual ~InternetStackHelper(void);
 
   /**
    * \param routing a new routing helper
diff --git a/src/helper/ipv4-global-routing-helper.cc b/src/helper/ipv4-global-routing-helper.cc
index 11e2398d6..db491a953 100644
--- a/src/helper/ipv4-global-routing-helper.cc
+++ b/src/helper/ipv4-global-routing-helper.cc
@@ -29,6 +29,17 @@ namespace ns3 {
 
 Ipv4GlobalRoutingHelper::Ipv4GlobalRoutingHelper ()
 {}
+
+Ipv4GlobalRoutingHelper::Ipv4GlobalRoutingHelper (const Ipv4GlobalRoutingHelper &o)
+{
+}
+
+Ipv4GlobalRoutingHelper* 
+Ipv4GlobalRoutingHelper::Copy (void) const 
+{
+  return new Ipv4GlobalRoutingHelper (*this); 
+}
+
 Ptr<Ipv4RoutingProtocol> 
 Ipv4GlobalRoutingHelper::Create (Ptr<Node> node) const
 {
diff --git a/src/helper/ipv4-global-routing-helper.h b/src/helper/ipv4-global-routing-helper.h
index dadbd242a..2e685af03 100644
--- a/src/helper/ipv4-global-routing-helper.h
+++ b/src/helper/ipv4-global-routing-helper.h
@@ -32,6 +32,15 @@ class Ipv4GlobalRoutingHelper  : public Ipv4RoutingHelper
 {
 public:
   Ipv4GlobalRoutingHelper ();
+  Ipv4GlobalRoutingHelper (const Ipv4GlobalRoutingHelper &);
+  /**
+   * \returns pointer to clone of this Ipv4GlobalRoutingHelper
+   *
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  Ipv4GlobalRoutingHelper* Copy (void) const;
+
   /**
    * \param node the node on which the routing protocol will run
    * \returns a newly-created routing protocol
@@ -63,6 +72,8 @@ public:
    *
    */
   static void RecomputeRoutingTables (void);
+private:
+  Ipv4GlobalRoutingHelper &operator = (const Ipv4GlobalRoutingHelper &o);
 };
 
 } // namespace ns3
diff --git a/src/helper/ipv4-list-routing-helper.cc b/src/helper/ipv4-list-routing-helper.cc
index 5115bc2f3..71b2f351c 100644
--- a/src/helper/ipv4-list-routing-helper.cc
+++ b/src/helper/ipv4-list-routing-helper.cc
@@ -25,16 +25,42 @@ namespace ns3 {
 
 Ipv4ListRoutingHelper::Ipv4ListRoutingHelper()
 {}
+
+Ipv4ListRoutingHelper::~Ipv4ListRoutingHelper()
+{
+  for (std::list<std::pair<const Ipv4RoutingHelper *, int16_t> >::iterator i = m_list.begin ();
+       i != m_list.end (); ++i)
+    {
+      delete i->first;
+    }
+}
+
+Ipv4ListRoutingHelper::Ipv4ListRoutingHelper (const Ipv4ListRoutingHelper &o)
+{
+  std::list<std::pair<const Ipv4RoutingHelper *, int16_t> >::const_iterator i;
+  for (i = o.m_list.begin (); i != o.m_list.end (); ++i)
+    {
+      m_list.push_back (std::make_pair (const_cast<const Ipv4RoutingHelper *> (i->first->Copy ()), i->second));
+    }
+}
+
+Ipv4ListRoutingHelper* 
+Ipv4ListRoutingHelper::Copy (void) const 
+{
+  return new Ipv4ListRoutingHelper (*this); 
+}
+
 void 
 Ipv4ListRoutingHelper::Add (const Ipv4RoutingHelper &routing, int16_t priority)
 {
-  m_list.push_back (std::make_pair(&routing,priority));
+  m_list.push_back (std::make_pair (const_cast<const Ipv4RoutingHelper *> (routing.Copy ()), priority));
 }
+
 Ptr<Ipv4RoutingProtocol> 
 Ipv4ListRoutingHelper::Create (Ptr<Node> node) const
 {
   Ptr<Ipv4ListRouting> list = CreateObject<Ipv4ListRouting> ();
-  for (std::list<std::pair<const Ipv4RoutingHelper *,int16_t> >::const_iterator i = m_list.begin ();
+  for (std::list<std::pair<const Ipv4RoutingHelper *, int16_t> >::const_iterator i = m_list.begin ();
        i != m_list.end (); ++i)
     {
       Ptr<Ipv4RoutingProtocol> prot = i->first->Create (node);
diff --git a/src/helper/ipv4-list-routing-helper.h b/src/helper/ipv4-list-routing-helper.h
index ef34068c7..5e6372936 100644
--- a/src/helper/ipv4-list-routing-helper.h
+++ b/src/helper/ipv4-list-routing-helper.h
@@ -35,7 +35,17 @@ namespace ns3 {
 class Ipv4ListRoutingHelper : public Ipv4RoutingHelper
 {
 public:
-  Ipv4ListRoutingHelper();
+  Ipv4ListRoutingHelper ();
+  virtual ~Ipv4ListRoutingHelper ();
+  Ipv4ListRoutingHelper (const Ipv4ListRoutingHelper &);
+  /**
+   * \returns pointer to clone of this Ipv4ListRoutingHelper 
+   * 
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  Ipv4ListRoutingHelper* Copy (void) const;
+
   /**
    * \param routing a routing helper
    * \param priority the priority of the associated helper
@@ -55,6 +65,8 @@ public:
    */
   virtual Ptr<Ipv4RoutingProtocol> Create (Ptr<Node> node) const;
 private:
+  Ipv4ListRoutingHelper &operator = (const Ipv4ListRoutingHelper &o);
+
   std::list<std::pair<const Ipv4RoutingHelper *,int16_t> > m_list;
 };
 
diff --git a/src/helper/ipv4-nix-vector-helper.cc b/src/helper/ipv4-nix-vector-helper.cc
index 3ac2d1eda..5d02e0e17 100644
--- a/src/helper/ipv4-nix-vector-helper.cc
+++ b/src/helper/ipv4-nix-vector-helper.cc
@@ -28,6 +28,17 @@ Ipv4NixVectorHelper::Ipv4NixVectorHelper ()
   m_agentFactory.SetTypeId ("ns3::Ipv4NixVectorRouting");
 }
 
+Ipv4NixVectorHelper::Ipv4NixVectorHelper (const Ipv4NixVectorHelper &o)
+  : m_agentFactory (o.m_agentFactory)
+{
+}
+
+Ipv4NixVectorHelper* 
+Ipv4NixVectorHelper::Copy (void) const 
+{
+  return new Ipv4NixVectorHelper (*this); 
+}
+
 Ptr<Ipv4RoutingProtocol> 
 Ipv4NixVectorHelper::Create (Ptr<Node> node) const
 {
diff --git a/src/helper/ipv4-nix-vector-helper.h b/src/helper/ipv4-nix-vector-helper.h
index c524cb03f..24f0ad8b9 100644
--- a/src/helper/ipv4-nix-vector-helper.h
+++ b/src/helper/ipv4-nix-vector-helper.h
@@ -38,6 +38,14 @@ class Ipv4NixVectorHelper : public Ipv4RoutingHelper
 {
 public:
   Ipv4NixVectorHelper ();
+  Ipv4NixVectorHelper (const Ipv4NixVectorHelper &);
+  /**
+   * \returns pointer to clone of this Ipv4NixVectorHelper 
+   * 
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  Ipv4NixVectorHelper* Copy (void) const;
 
   /**
   * \param node the node on which the routing protocol will run
@@ -48,6 +56,8 @@ public:
   virtual Ptr<Ipv4RoutingProtocol> Create (Ptr<Node> node) const;
 
 private:
+  Ipv4NixVectorHelper &operator = (const Ipv4NixVectorHelper &o);
+
   ObjectFactory m_agentFactory;
 };
 } // namespace ns3
diff --git a/src/helper/ipv4-routing-helper.h b/src/helper/ipv4-routing-helper.h
index 9c8a28233..ed686f826 100644
--- a/src/helper/ipv4-routing-helper.h
+++ b/src/helper/ipv4-routing-helper.h
@@ -40,6 +40,16 @@ class Ipv4RoutingHelper
 {
 public:
   virtual ~Ipv4RoutingHelper ();
+
+  /**
+   * \brief virtual constructor
+   * \returns pointer to clone of this Ipv4RoutingHelper 
+   * 
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  virtual Ipv4RoutingHelper* Copy (void) const = 0;
+
   /**
    * \param node the node within which the new routing protocol will run
    * \returns a newly-created routing protocol
diff --git a/src/helper/ipv4-static-routing-helper.cc b/src/helper/ipv4-static-routing-helper.cc
index 6f05b0890..e5daf5e7f 100644
--- a/src/helper/ipv4-static-routing-helper.cc
+++ b/src/helper/ipv4-static-routing-helper.cc
@@ -35,6 +35,17 @@ namespace ns3 {
 
 Ipv4StaticRoutingHelper::Ipv4StaticRoutingHelper()
 {}
+
+Ipv4StaticRoutingHelper::Ipv4StaticRoutingHelper (const Ipv4StaticRoutingHelper &o)
+{
+}
+
+Ipv4StaticRoutingHelper* 
+Ipv4StaticRoutingHelper::Copy (void) const 
+{
+  return new Ipv4StaticRoutingHelper (*this); 
+}
+
 Ptr<Ipv4RoutingProtocol> 
 Ipv4StaticRoutingHelper::Create (Ptr<Node> node) const
 {
diff --git a/src/helper/ipv4-static-routing-helper.h b/src/helper/ipv4-static-routing-helper.h
index 06907eff6..adc7952cb 100644
--- a/src/helper/ipv4-static-routing-helper.h
+++ b/src/helper/ipv4-static-routing-helper.h
@@ -40,7 +40,15 @@ namespace ns3 {
 class Ipv4StaticRoutingHelper : public Ipv4RoutingHelper
 {
 public:
-  Ipv4StaticRoutingHelper();
+  Ipv4StaticRoutingHelper ();
+  Ipv4StaticRoutingHelper (const Ipv4StaticRoutingHelper &);
+  /**
+   * \returns pointer to clone of this Ipv4StaticRoutingHelper
+   *
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  Ipv4StaticRoutingHelper* Copy (void) const;
 
   /**
    * \param node the node on which the routing protocol will run
@@ -74,6 +82,8 @@ public:
   void SetDefaultMulticastRoute (Ptr<Node> n, std::string ndName);
   void SetDefaultMulticastRoute (std::string nName, Ptr<NetDevice> nd);
   void SetDefaultMulticastRoute (std::string nName, std::string ndName);
+private:
+  Ipv4StaticRoutingHelper &operator = (const Ipv4StaticRoutingHelper &o);
 
 };
 
diff --git a/src/helper/ipv6-list-routing-helper.cc b/src/helper/ipv6-list-routing-helper.cc
index 006b63954..8479bfcac 100644
--- a/src/helper/ipv6-list-routing-helper.cc
+++ b/src/helper/ipv6-list-routing-helper.cc
@@ -27,10 +27,34 @@ namespace ns3 {
 
 Ipv6ListRoutingHelper::Ipv6ListRoutingHelper ()
 {}
+
+Ipv6ListRoutingHelper::~Ipv6ListRoutingHelper()
+{
+  for (std::list<std::pair<const Ipv6RoutingHelper *, int16_t> >::iterator i = m_list.begin ();
+       i != m_list.end (); ++i)
+    {
+      delete i->first;
+    }
+}
+Ipv6ListRoutingHelper::Ipv6ListRoutingHelper (const Ipv6ListRoutingHelper &o)
+{
+  std::list<std::pair<const Ipv6RoutingHelper *, int16_t> >::const_iterator i;
+  for (i = o.m_list.begin (); i != o.m_list.end (); ++i)
+    {
+      m_list.push_back (std::make_pair (const_cast<const Ipv6RoutingHelper *> (i->first->Copy ()), i->second));
+    }
+}
+
+Ipv6ListRoutingHelper* 
+Ipv6ListRoutingHelper::Copy (void) const 
+{
+  return new Ipv6ListRoutingHelper (*this); 
+}
+
 void 
 Ipv6ListRoutingHelper::Add (const Ipv6RoutingHelper &routing, int16_t priority)
 {
-  m_list.push_back (std::make_pair (&routing,priority));
+  m_list.push_back (std::make_pair (const_cast<const Ipv6RoutingHelper *> (routing.Copy ()), priority));
 }
 Ptr<Ipv6RoutingProtocol> 
 Ipv6ListRoutingHelper::Create (Ptr<Node> node) const
diff --git a/src/helper/ipv6-list-routing-helper.h b/src/helper/ipv6-list-routing-helper.h
index 81fd725eb..945f78e11 100644
--- a/src/helper/ipv6-list-routing-helper.h
+++ b/src/helper/ipv6-list-routing-helper.h
@@ -38,6 +38,16 @@ class Ipv6ListRoutingHelper : public Ipv6RoutingHelper
 {
 public:
   Ipv6ListRoutingHelper ();
+  virtual ~Ipv6ListRoutingHelper ();
+  Ipv6ListRoutingHelper (const Ipv6ListRoutingHelper &);
+  /**
+   * \returns pointer to clone of this Ipv6ListRoutingHelper 
+   * 
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  Ipv6ListRoutingHelper* Copy (void) const;
+
   /**
    * \param routing a routing helper
    * \param priority the priority of the associated helper
@@ -57,6 +67,8 @@ public:
    */
   virtual Ptr<Ipv6RoutingProtocol> Create (Ptr<Node> node) const;
 private:
+  Ipv6ListRoutingHelper &operator = (const Ipv6ListRoutingHelper &o);
+
   std::list<std::pair<const Ipv6RoutingHelper *,int16_t> > m_list;
 };
 
diff --git a/src/helper/ipv6-routing-helper.h b/src/helper/ipv6-routing-helper.h
index 8da0abce4..ac3536871 100644
--- a/src/helper/ipv6-routing-helper.h
+++ b/src/helper/ipv6-routing-helper.h
@@ -41,6 +41,16 @@ class Ipv6RoutingHelper
 {
 public:
   virtual ~Ipv6RoutingHelper ();
+
+  /**
+   * \brief virtual constructor
+   * \returns pointer to clone of this Ipv6RoutingHelper 
+   * 
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  virtual Ipv6RoutingHelper* Copy (void) const = 0;
+
   /**
    * \param node the node within which the new routing protocol will run
    * \returns a newly-created routing protocol
diff --git a/src/helper/ipv6-static-routing-helper.cc b/src/helper/ipv6-static-routing-helper.cc
index 793e2b993..f155fa55d 100644
--- a/src/helper/ipv6-static-routing-helper.cc
+++ b/src/helper/ipv6-static-routing-helper.cc
@@ -37,6 +37,17 @@ namespace ns3 {
 
 Ipv6StaticRoutingHelper::Ipv6StaticRoutingHelper ()
 {}
+
+Ipv6StaticRoutingHelper::Ipv6StaticRoutingHelper (const Ipv6StaticRoutingHelper &o)
+{
+}
+
+Ipv6StaticRoutingHelper* 
+Ipv6StaticRoutingHelper::Copy (void) const 
+{
+  return new Ipv6StaticRoutingHelper (*this); 
+}
+
 Ptr<Ipv6RoutingProtocol> 
 Ipv6StaticRoutingHelper::Create (Ptr<Node> node) const
 {
diff --git a/src/helper/ipv6-static-routing-helper.h b/src/helper/ipv6-static-routing-helper.h
index 700dc86dd..92cecde79 100644
--- a/src/helper/ipv6-static-routing-helper.h
+++ b/src/helper/ipv6-static-routing-helper.h
@@ -45,6 +45,14 @@ public:
    * \brief Constructor.
    */
   Ipv6StaticRoutingHelper ();
+  Ipv6StaticRoutingHelper (const Ipv6StaticRoutingHelper &);
+  /**
+   * \returns pointer to clone of this Ipv6StaticRoutingHelper
+   *
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  Ipv6StaticRoutingHelper* Copy (void) const;
 
   /**
    * \param node the node on which the routing protocol will run
@@ -80,6 +88,8 @@ public:
   void SetDefaultMulticastRoute (std::string nName, Ptr<NetDevice> nd);
   void SetDefaultMulticastRoute (std::string nName, std::string ndName);
 #endif
+private:
+  Ipv6StaticRoutingHelper &operator = (const Ipv6StaticRoutingHelper &o);
 };
 
 } // namespace ns3
diff --git a/src/helper/olsr-helper.cc b/src/helper/olsr-helper.cc
index eb464afac..5ad1479a9 100644
--- a/src/helper/olsr-helper.cc
+++ b/src/helper/olsr-helper.cc
@@ -30,6 +30,17 @@ OlsrHelper::OlsrHelper ()
   m_agentFactory.SetTypeId ("ns3::olsr::RoutingProtocol");
 }
 
+OlsrHelper::OlsrHelper (const OlsrHelper &o)
+  : m_agentFactory (o.m_agentFactory)
+{
+}
+
+OlsrHelper* 
+OlsrHelper::Copy (void) const 
+{
+  return new OlsrHelper (*this); 
+}
+
 Ptr<Ipv4RoutingProtocol> 
 OlsrHelper::Create (Ptr<Node> node) const
 {
diff --git a/src/helper/olsr-helper.h b/src/helper/olsr-helper.h
index 7a40044d7..4baedd199 100644
--- a/src/helper/olsr-helper.h
+++ b/src/helper/olsr-helper.h
@@ -37,6 +37,14 @@ class OlsrHelper : public Ipv4RoutingHelper
 {
 public:
   OlsrHelper ();
+  OlsrHelper (const OlsrHelper &);
+  /**
+   * \returns pointer to clone of this OlsrHelper 
+   * 
+   * This method is mainly for internal use by the other helpers;
+   * clients are expected to free the dynamic memory allocated by this method
+   */
+  OlsrHelper* Copy (void) const;
 
   /**
    * \param node the node on which the routing protocol will run
@@ -54,6 +62,7 @@ public:
    */
   void Set (std::string name, const AttributeValue &value);
 private:
+  OlsrHelper &operator = (const OlsrHelper &o);
   ObjectFactory m_agentFactory;
 };