All Enemies Are Sith

Description
Well this is, first off, a single player mod. It also includes several other skins and models to go with it. What it does (and rather nicely) is replace all the enemies you fight in single player with sith characters. Using the added on skins and models, this mod also replaces some of the other characters. Tavion, for instance, is now Palpatine. Other are replaced as well.
I didn't take the time to test this fully, but it looks very fun, and a bit more challenging than usual. Try protecting rosh from two sith that should be howlers. :p
If you like SP mods, or if you want something more challenging, give this a download.

~Zach