i guess none of the PT elements are fixed really, so maybe not all the leaders would be executed. i was imagining that jabba would be an investor as oppose to a warlord. it would be good if he is in most of the scenes as a background character, and maybe even making the odd speech.
im not sure if the ANH footage would be worth the hassle, as its not that brilliant anyway. maybe a new CG jabba or a puppet would work?