The UI to access the generation features is currently implemented as a Visual Studio custom tool, which is unfortunately only supported by some project types. Specifically, we have tested it with the various Visual Basic and C# project types, though it will probably also work for the J# project types.
We will likely be creating an ORM project sub-type, that transparently wraps any and all existing project types in Visual Studio and exposes the ORM features as appropriate. This is only in the initial planning stages currently, so I can't promise when it will be ready...