A while ago for my own use I took the idea of generic classes from the DMG and applied it to Star Wars. I ended up with three classes, the Force User, the Warrior, and the Expert. This was before Blue Rose and True20 came out. In my version, I took each class ability from the Star Wars classes and made them into a single list of class abilities, and whenever a person gained a level that listed a Class Ability, they could select from any of the abilities available (which was a whole heck of a lot). I also did what they did in the DMG, with bonus feats, and ruled that whenever a character got a bonus feat, they could use it for another class ability instead of a feat.
I haven't had a chance to really play with these generic classes, and now that BR is out (and I just got it), I think I'm going to redo my generic classes to fit the BR rules a bit (no hit points, use damage saves) and go from there.