Hey this sounds cool, I have all 7 Ultimate Editions on Blu Ray if you need me to rip anything from the discs to help out. I also have ADigitalMans EE of 1 - 5 and Doctor Ms HBP EE if you'd like them as a reference.

I like this idea, I was considering doing edits for all 8 that stick a lot closer to the books similar to the Red Book edits of Lord of the rings but I'm just not sure there is enough material from the books in movies 4 - 6 to make a whole movie.

There are 2 Fan Edits the PS and COS Revisited that aim to make the first two look a little closer to the movies from 3 to 8 I'd suggest giving them a look as they are pretty fantastic and could help with ideas for music changes etc. Good Luck.

Oh and also I don't have a huge amount of spare time but if you need help with any editing I'd be able to help here and there.