Okay, this can actually make me buy TFUII. Check out
this mod.
This guy imported every animation and costumes from both games into playable characters/animations. Do you want to play as Vader? Got it. Do you want to play with a normal lightsaber stance? Got it, too. Do you want to play with a double-bladed lightsaber like Darth Maul (or even as Darth Maul)? This guy got it all covered. You can combine every costume with every animation set.
Make sure you download v1.8.
P.S: This mod doesn't work with v1.1. So don't patch the game.
Some pictures:
Threaded Mode