The 6th mission of the republic campaign has a bonus, the one where you have to rescue Naat Reath. Take a jedi starfighter to the far left of the map and you will take control of a Sith Temple, and Senator Palpatine (blaster, not the sith lord one) and Anakin Skywalker. I never used them, but they might help out.

Have fun.
May the Force be with you.
Jedi Master Jono