I can't dig up my old mods right now, but if you want to change out mara you could replace her file with say Kyle or Luke. If I remember correctly she is mara.3do and Kyle is kk.3do or ky.3do. It has been so long that this may be incorrect.
I edited SBX for both JK and MotS to have a key that could rotate models so I could have a robed character--> unrobed--> Maul--> Obi Wan
Since SBX used their lightsabers.