If you can find them on the net, I highly recommend Adywan's Star Wars and Empire Strikes Back. He adds a lot of extra details and general tinkering. Some of which are more noticeable than others. He's been working on these films for years, and only Star Wars and Empire are available as 8gb SD versions. He paused work on Jedi to start the process all over again in HD.

Furthermore, he's even gone as far as building his own miniatures, building a life-size Solo in carbonite and filming fans in costume to add to his own edits (just for Jedi). If you find his website, he said the next release should be Star Wars: Revisited in HD during the middle of this year, 2024.

EDIT: I fancied watching these myself and went hunting. Star Wars wa released as a 9GB DVD ISO in PAL and NTSC format. Empire was released as a 7.5gb 720P MKV file.