You know the squealy notes like on live crazy train or welcome home by coheed and cambria? Is it a distortion thing with a normal bend or what?
Pinch Harmonics are what you are talking about.
whenever you hit the string with your pic, you kinda have to follow your pick hit with a mute with the thumb on your picking finger. it's better to have someone show you how to do this rather then be told, it'll help alot more trust me.
^ Yeah, thats why I didn't even bother trying to explain it. There are some lessons and vids on this site that would help him though, now that I think about it.