Ok... here is my little contribution... Thanks to PhilC and Poseworks, I manage to create a "complex" GUI.

Actually, I can't make it available (I need to clean the code and remove personal code). But as soon as my main app is finished, I will clean it to make it available to everyone.

PhilC: For the radio buttons... here is the trick (if you didn't find it already). Everythin is coded in the xml file.

1° set the radio buttons in one unique groupID.
2° set the behaviorProcID value to 2.

And... it's finished ! The "behaviorProcID" says: only me is selected, all radiobuttons in the same group must be unselected !

Hope it helps... Also, there are some other "xml tags" that might be useful. But still need to test it !