GetModuleCatalog has become CreateModuleCatalog. There was a pattern we saw emerging in the bootstrapper classes where there are a number of things you need to create, then configure. This method was renamed for consistency.
Take a look at the modularity quickstarts for an idea of the new naling pattern, or look at one of the two bootstrapers (UnityBootstrapper in the UnityExtensions.dll or MefBootstrapper inthe MefExtensions.Dll) and the Run method to see the basic
sequence of method calls.
The next drop will have docs around the bootstrapper which should help with the confusion.
If you are still having issues, let me know,