A quick side story, sorry to hijack... I haven't done a lot of film score work but was lucky enough to play a few times for Randy Newman, "Meet the Fockers" being one. During that session there was a scene where they needed a bit of incidental music - maybe like they were in a bar and this was playing in the background, so somewhat removed from the actual score. Randy just asked us to ad lib a quick blues with drums, bass, guitar and violin - if I remember correctly. But because HE is such a great guy, he gave us musicians composer credit for that "cue". To this day we all get composer residuals for that little piece of music. Now THAT is how to treat your fellow musos!
Jimmy J