This comment will be a little out of place, as it refers more to your future projects than the present, but I was trying to think of ways to tie things together in the ways that you have outlined elsewhere. You mentioned that the prequel trilogy would need some major plot restructuring to maintain important surprises when the trilogy is watched from Episodes I-VI, most notably the fact that Darth Vader is Anakin Skywalker. That would of course require the removal of Palpatine's "anointing" him, as well as his breaking Padme's heart and the subsequent lightsaber duel with Obi-Wan. What occurs to me is that with these important scenes removed, you lose much of the understanding of how Anakin fell. However, I agree completely that the PT spoils a lot of the surprises of the OT. A possible solution would be the insertion of a flashback scene during Obi-Wan's background exposition to Luke on Dagobah in ROTJ. It would be up to you if you wanted to utilize the whole scene or merely clips of course, and perhaps some Alec Guiness impersonations to expand upon the flashback. While the scenes spoil the ultimate secret of Vader's relationship to Luke, I don't feel it should be discarded completely.