I noticed in VS2012 that when you make a new EF Model (.edmx) that the DbContext is the default code generation and the .tt (T4 template) files are now nested underneath
Instead of editing project files, I add a EF model of the same name to the project, close the solution, copied the model files from the other project, and reopen the solution. I change the namespace in the edmx properties and then recompile the model.