The dvd version of the garage scene is missing 10 to 15 frames on either side of the additional material. The theatrical cut is actually available within one of the extras on disc 2 of the dvd set. I can't remember which documentarmy, though. The problem is that it's 16:9 instead of 2.35:1, so the footage doesn't match the rest of the movie. All other known changes are in the DVD active article:

http://www.dvdactive.com/editorial/articles/star-wars-the-changes-part-four.html

The theatrical DTS CDs are also circulating.

Maybe team negative-1 can telecine the few hundred frames that would make a theatrical version possible ??