I want to extract some files (especially music files) from a 360 image (.iso an .dvd) to play around with, but can't find a tool which works with wave3+ games...
Any Help?

thanks in advance!

I haven't tried to do this myself, but here's a thought:

If you haven't already, download easy xbins (goole search)

It has quite literally everything you could ever need 360 wise, take a look!