It took me a while to figure out what was going on with the game. At first I wanted to be a jedi all the time, but I think I like the concept of mostly just being regular soldiers.
Here were some questions I had that I think I figured out and some questions that I still don't understand.
-How do I be a Jedi in this game? You can earn points or be the server and set the server to spawn the heros more frequently and set a lower level of points that are required to become a hero.
-How do I pick which hero I can be on a given level or is it set? Mos Eisly assult comes up as Heros vs Villians, which allows you to pick any of the heros or villians, depending on which team you are on. That still doesn't answer how to pick a jedi when in Jaba's palace rather than being Boba Fett.
Found a FAQ site on this game that looks like it might be a little helpful. http://pc.ign.com/objects/737/737696.html#reviews