Scream Vocals???

How do you do it.... I know its not like normal screaming so how the hell can i get a good tonal quality out of my screams???

I do use my diaphramgh however i was told it had nothin to do with it.

You have to make sure that your vocal chords are working normally, i.e. never strain your throat area when screaming! The increasing of the voice volume should happen by activating your diaphragm only, not by tensing the throat!