These games have some great tunes, especially the credits for GC1. I'm disappointed that they weren't made available.

Yes, it's a real shame!
The soundtrack used to be available here:
http://www.massive.se/gcdownload/

And I was planning to download it when I finished the game, but by the time I did that ... the site went down :(

Yeah, it's really too bad. I used to have the GC1 track, and must've played it a million times, especially the cool music from the credits.