With the latest WIP version you can do this by serializing the context to memory and then deserialize it to another context instance.

The feature is still in development but already working except possibly for some cases not tested yet. Unfortunately it is not documented yet, but you can see how it works in the test_feature app you can find the tests that I use as well as an initial implementation for serializing a context to memory.

http://svn.code.sf.net/p/angelscript/code/trunk/sdk/tests/test_feature/source/test_context.cpp