The guitarist in Fozzy, Rich Ward, used to be in Stuck Mojo from Atlanta. Very cool guy, I got to hang out with him multiple times. I think he uses a whammy pedal along with an artificial (pinch) harmonic to get that sound.....If you've never heard Stuck Mojo, which of course broke up, which sucks, then get one of their c.d.'s....they rock.

http://www.stuckmojo.net/

Oh, the 2 c.d.'s that are my personal favorites are Snappin' Necks and Pig Walk......worth a listen.