You might be interested in the Demon Face Tutorial from VideoCopilot, probably has a few techniques you could use to recreate that look.
Johnny Cuevas, Editor
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.