absolutely thin application layer above spring+gwt multi module

Hi All,

I made a multi module project with spring+gwt with roo.
its structure is:

app
|
+ core
+ gwt


Next I need a thin layer of the next - lot of - new projects based on this app. All of the new projects have different config files, and only one source file changed.

How can realize it? What is the best method?

If I make a new submodule under gwt for all subproject, I cannot use roo, because it hasn't any gwt request, and maven cannot compile it, because roo uses Aspectj.

Another possible method is if I use only one gwt, and I change configs and the source in it depends on the current project.

Anybody has this problem already?

thx
Zamek