Music composed by Graeme Revell
Adapted from original music by Bernard Herrmann

Since Psycho IV: The Beginning was a made for cable TV, there was no official soundtrack/score release of the great music in the movie. Much of the score is exactly the same from the original work of Bernard Herrmann. However, there are several cues that are new and are composed by Graeme Revell. A promo CD release came out and many soundtrack collectors have managed to get their hands on a copy.

Samples:

Little Boys Can Be Giants

No More Blood Norman