KotOR II is not multiplayer, and the patch you described sounds like one they made for Star Wars: Battlefront II, adding Asajj Ventress and another Jedi into the game, along with several maps, including Rhen Var from the first.
Otherwise, I haven't heard of this other mod or patch. If I'm mistaken, then
contact fable about reopening this thread (I may be wrong), as I'm closing and moving it to the KotOR II forum.