You can always contact the record company and ask! It does work also... we called Skint Records (Fatboy Slim & Midfield General to name but two).
Kindly they allowed us, free of charge, to use a track from either Midfield General or Space Raiders. In the end we chose (fior reasons that are obvious in teh film) a track called Middles Boogie, which had also been in Spaced.
We got that, the use of teh credit and the abiklity to promote it for free. Just because we asked nicely.
BUT like everyone else said DONT just use it. And respect the fact that you will never get some music (The Beetles for example are hyper protective about their rights as are the Stones).
HJope this helps!
Phil Hobden
-- Modern Life? --