Regarding the Han and Jabba Episode IV scene...
I always thought the best way to fix the Jabba tail was to have it cut to Chewy leering at the Bounty Hunters and maybe Boba Fet keeping an eye on Chewy back while clutching his gun, both waiting for the other to make some move. Fixes the Jabba tail thing and also adds tension. Only reason I say Boba is because stock footage could be throw in whereas the other ones in the gang don't have any decent shots.
Btw, this is my quote, i fudged something up in the post, hehe.