I'm all for adding dialogue to the duel, I just don't think that's the dialogue to add. At first I thought it would be cool for Vader to say, "Again you underestimate my power!" but that's silly for 2 reasons. 1) The last time he said that, Obi-Wan chopped off his arms and legs. 2) He didn't win, Obi-Wan just gave up. I'm not sure what would be appropriate to add the th duel other than maybe a Vader grimace as he swings the killing blow.

I love the Neimoidians' voices! What is the source, because they don't sound like they came from a foreign language track. If they did all the better, because I couldn't tell and it sounded great! I'll try to come up with some dialogue for that scene.

As for Qui-Gon in RotJ: He discovered the path to immortality, he deserves to be there. But those are the only four Jedi who should be, as none of the others learned how. This puts to rest the common "Field of Dreams" criticizm when it comes to adding Jinn to the end of Jedi. An example of how to accomplish this can be found here (created by sepharih at TF.N): http://rapidshare.de/files/3067435/Quirotj20.mov.html

So something along those lines. The ideal scenario, IMO, would be have Luke see the original 3 ghosts and then join the celebration. The 3 then morph into their PT selves, with Qui-Gon joining them. Then the original final shot with the OT gang, then a NEW final show with the SAGA gang: the force spirits. I've argued many a time it would be appropriate for Padme to be there with Anakin as their love is what drove them to do what they did, and it would make Star Wars a true fairy tale ending. But I know almost no one agrees with me and even I must admit it wouldn't make much sense. At least Qui-Gon has an explainable reason to be there.