Thank you for reposting your problem. I don't think I posted this before:
2. (Did you see this one on UTube?) http://www.youtube.com/watch?v=E2gYCWZMVik
3. (the Japanese version! More background noise but music there as well.): http://www.youtube.com/watch?v=E2gYCWZMVik
4. Unfortunately, I'm not sure what John was referring to in the Harry Potter film(s):
Perhaps you could do a search here: http://www.filmtracks.com/titles/harry_potter.html
I was referring to the bonus material in the Harry Potter DVD. There was such a feature where you can see the director talking about something like 'how to edit a scene'. There they are comparing different music and sound effects versions.
I think that would be quite a good thing for the report. But I don't know exactly where you can download these extras material. I know you can somewhere but I can't remember the webside. So maybe anyone else knows how to help.