This is a summation of the rules as they came in the Black Series of the game, as well as pieces of threads on BGG. I believe these rules are the same for the original game, but some were not clearly presented in the earlier version's rule book. It looks as though this document will need to evolve in the future as Hasbro continues to refine its answers. (v.2)
V.2: made a correction regarding removal of stormtroopers; and corrected "redemption of Vader" to be consistent with the designer's intent.