I found another link here that has a 44mb sized file of it so the quality should be better and it also has a link for the full stormtrooper orchestra that you see at the end of revenge of the brick.
On the Clone Wars Season 2 dvd they have Revenge of the Brick in surround sound.
I also found this site that looks to cover SW lego stuff, FBTB.net
Hope that helps you.
Are you planning on doing a professional looking disc or just one to watch now and then because I think a dvd dedicated to SW lego stuff would be cool?