Well, you'd have to set up the menu system to split up the current "species" selection stuff into Jedi and Sith lists. I imagine you'd have to just use some fancy .menu editting to either hardwire the possible selections or write up some new UI scripts to sort the models into Sith/Jedi catagories.
I'd probably just examine how the species button on the current menus works and go from there.
---Jedi Guardian of the Newbie Questions
---Masters of the Force Team Leader / Creator
---Open Jedi Project Lead Moderator / Co-Founder