If you want my two cents, this is doable; not simple, but doable.

First of all, there’s very little out there to suggest the differences in optical transitions or compositing have any truth to them. I have a feeling since we were working from word of mouth for so long that some misremembered facts just kept creeping in. So, don’t take everything on the wiki seriously; it’s based on much older info and a lot of it has been disproved in recent years. In my mind, we should only consider the changes that we have definitive proof of (the missing Falcon dish and the static Emperor).

That being said, I do think the alternate edit of the Bacta Tank scene is probably true. The edit would have been very easy to make, since they cut the shot right after the original optical transition ended. And something about how quick that cut is makes me think that it was a last minute decision. A portion of the complete original shot is in color in the 1979 Harrison Ford-narrated trailer, and the full shot is on the BD extras, though unfortunately in black and white.

The sound mix will probably be the comparatively easy part of it, especially with a form of direct reference. The only difficult part would be trying to incorporate the alternate take of ‘Princess, we’ll find Han, I promise’, since to my knowledge the only other place that appears is the Story-Of album.