You need to go to explore the galaxy (the small globe under the character configuration menu) and click on republic cruser.
As a Jedi you have throw the orange box at him, then switch to a Clone Trooper and hit the B button to grapple his leg. This will take his leg off ... do it again to ther other leg. He will jump up...
use this cheat: sarlaccfood
the station is on the star destroyer
You need to unlock all the other characters first.