diff --git a/include/boost/python/manage_new_object.hpp b/include/boost/python/manage_new_object.hpp
new file mode 100644
index 00000000..9c0912ab
--- /dev/null
+++ b/include/boost/python/manage_new_object.hpp
@@ -0,0 +1,42 @@
+// Copyright David Abrahams 2002. Permission to copy, use,
+// modify, sell and distribute this software is granted provided this
+// copyright notice appears in all copies. This software is provided
+// "as is" without express or implied warranty, and with no claim as
+// to its suitability for any purpose.
+#ifndef MANAGE_NEW_OBJECT_DWA200222_HPP
+# define MANAGE_NEW_OBJECT_DWA200222_HPP
+# include <boost/python/detail/indirect_traits.hpp>
+# include <boost/mpl/select_type.hpp>
+# include <boost/python/to_python_indirect.hpp>
+# include <boost/type_traits/composite_traits.hpp>
+
+namespace boost { namespace python { 
+
+namespace detail
+{
+  template <class R>
+  struct manage_new_object_requires_a_pointer_return_type
+# if defined(__GNUC__) && __GNUC__ >= 3 || defined(__EDG__)
+  {}
+# endif
+  ;
+}
+
+template <class T> struct to_python_value;
+
+struct manage_new_object
+{
+    template <class T>
+    struct apply
+    {
+        typedef typename mpl::select_type<
+            boost::is_pointer<T>::value
+            , to_python_indirect<T, detail::make_owning_holder>
+            , detail::manage_new_object_requires_a_pointer_return_type<T>
+        >::type type;
+    };
+};
+
+}} // namespace boost::python
+
+#endif // MANAGE_NEW_OBJECT_DWA200222_HPP
diff --git a/include/boost/python/object/inheritance.hpp b/include/boost/python/object/inheritance.hpp
new file mode 100644
index 00000000..ceeac8f9
--- /dev/null
+++ b/include/boost/python/object/inheritance.hpp
@@ -0,0 +1,165 @@
+// Copyright David Abrahams 2002. Permission to copy, use,
+// modify, sell and distribute this software is granted provided this
+// copyright notice appears in all copies. This software is provided
+// "as is" without express or implied warranty, and with no claim as
+// to its suitability for any purpose.
+#ifndef INHERITANCE_DWA200216_HPP
+# define INHERITANCE_DWA200216_HPP
+
+# include <boost/python/converter/type_id.hpp>
+# include <boost/shared_ptr.hpp>
+
+namespace boost { namespace python { namespace objects {
+
+typedef converter::undecorated_type_id_t class_id;
+using converter::undecorated_type_id;
+
+// Types used to get address and id of most derived type
+typedef std::pair<void*,class_id> dynamic_id_t;
+typedef dynamic_id_t (*dynamic_id_function)(void*);
+
+BOOST_PYTHON_DECL void register_dynamic_id_aux(
+    class_id static_id, dynamic_id_function get_dynamic_id);
+
+BOOST_PYTHON_DECL void add_cast(
+    class_id src_t, class_id dst_t, void* (*cast)(void*), bool polymorphic);
+
+BOOST_PYTHON_DECL void* find_static_type(void* p, class_id src, class_id dst);
+
+BOOST_PYTHON_DECL void* find_dynamic_type(void* p, class_id src, class_id dst);
+
+// is_polymorphic test from John Maddock
+template <class T>
+struct is_polymorphic
+{
+   struct d1 : public T
+   {
+      d1();
+      char padding[256];
+   };
+   struct d2 : public T
+   {
+      d2();
+      virtual ~d2();
+      virtual void foo();
+      char padding[256];
+   };
+   BOOST_STATIC_CONSTANT(bool, value = (sizeof(d2) == sizeof(d1)));
+};
+
+//
+// a generator with an execute() function which, given a source type
+// and a pointer to an object of that type, returns its most-derived
+// /reachable/ type identifier and object pointer.
+//
+
+// first, the case where T has virtual functions
+template <class T>
+struct polymorphic_id_generator
+{
+    static dynamic_id_t execute(void* p_)
+    {
+        T* p = static_cast<T*>(p_);
+        return std::make_pair(dynamic_cast<void*>(p), class_id(typeid(*p)));
+    }
+};
+
+// now, the non-polymorphic case.
+template <class T>
+struct non_polymorphic_id_generator
+{
+    static dynamic_id_t execute(void* p_)
+    {
+        return std::make_pair(p_, converter::undecorated_type_id<T>());
+    }
+};
+
+// Now the generalized selector
+template <class T>
+struct dynamic_id_generator
+{
+    typedef typename mpl::select_type<
+        is_polymorphic<T>::value
+        , polymorphic_id_generator<T>
+        , non_polymorphic_id_generator<T> >::type type;
+};
+
+// Register the dynamic id function for T with the type-conversion
+// system.
+template <class T>
+void register_dynamic_id(T* = 0)
+{
+    typedef typename dynamic_id_generator<T>::type generator;
+    register_dynamic_id_aux(
+        converter::undecorated_type_id<T>(), &generator::execute);
+}
+
+//
+// a generator with an execute() function which, given a void*
+// pointing to an object of type Source will attempt to convert it to
+// an object of type Target.
+//
+
+template <class Source, class Target>
+struct dynamic_cast_generator
+{
+    static void* execute(void* source)
+    {
+        return dynamic_cast<Target*>(
+            static_cast<Source*>(source));
+    }
+        
+};
+
+template <class Source, class Target>
+struct implicit_cast_generator
+{
+    static void* execute(void* source)
+    {
+        Target* result = static_cast<Source*>(source);
+        return result;
+    }
+};
+
+template <class Source, class Target>
+struct cast_generator
+{
+    // CWPro7 will return false sometimes, but that's OK since we can
+    // always cast up with dynamic_cast<>
+    BOOST_STATIC_CONSTANT(
+        bool, is_upcast = (
+            is_base_and_derived<Target,Source>::value
+            ));
+
+    typedef typename mpl::select_type<
+        is_upcast
+# if defined(__MWERKS__) && __MWERKS__ <= 0x2406
+        // grab a few more implicit_cast cases for CodeWarrior
+        || !is_polymorphic<Source>::value
+        || !is_polymorphic<Target>::value
+# endif 
+        , implicit_cast_generator<Source,Target>
+        , dynamic_cast_generator<Source,Target>
+    >::type type;
+};
+
+template <class Source, class Target>
+inline void register_conversion(
+    // We need this parameter because CWPro7 can't determine
+    // which is the base reliably.
+    bool is_downcast = !cast_generator<Source,Target>::is_upcast
+
+    // These parameters shouldn't be used, they're an MSVC bug workaround
+    , Source* = 0, Target* = 0)
+{
+    typedef typename cast_generator<Source,Target>::type generator;
+    
+    add_cast(converter::undecorated_type_id<Source>()
+             , converter::undecorated_type_id<Target>()
+             , &generator::execute
+             , is_downcast);
+}
+
+}}} // namespace boost::python::object
+
+#endif // INHERITANCE_DWA200216_HPP