why is my belt squeeling!

A lady I work with had a similar prob on her 95 gt. It ended up being that the power steering pully was cocked sidewayz a little and it was causing the alternator to make the noise. This happened after she bought a shorter belt to by pass the a/c. She had to buy a new pully and it is fine now. I think wystangs idea is the best way to figure out which pully it is. But it has to be one of them.