Well, I have a Warlock (BC Rich), but I suck at playing guitar...
Anyway, Yep, I'm sure I need only descent musics lol, but if I can get to finish this campaign one day (shouldn't be that hard in fact, I've done almost all the mods) I have a new project, even more easy to do (for the models part at least) that WILL require brand new musics (coz I'm sure I can't use the original ones at all).
About the midi pb, that strange... I listen to them in winamp, and I think I got "quite a good ear", and I never noticed anything wrong (well on one midi maybe, but I don't think it's one of those I sent you).
If you can't work on these ones, though, I can send you the whome music pack, and you could pick up the ones you can work on?