Rage Mechanics Question and Idea

The question is easy - where and how does the same store information that determines in what order Rages appear in the menu? Is manually re-organizing them would be plausible?

The idea is more complicated, I don't wanna do this on my end but I think it could be neat - could Rage and Control be combined? I mean that like, when Gau Rages say, the Magitek Armor, instead of randomly using one of the two Rage commands each turn, he acts like Relm Controlling an enemy; when his turn comes up you get the Control command window with the four Control attacks, and can manually input a command for him each turn.

Would this be possible?