You should check out Kah's tutorial here:
http://www.lucasforums.com/showthread.php?t=167221)
He really went into alot of detail (with screenies ;) )
I know I just want to see his by curiosity, beacause Kha said it may not work for heads.
Also, I ask Kha if he could wrote this tutorial for people like me who suck with GMax or 3DS Max and to be honest, I never got to understand it completly, lets say I understand 3/4 of it. For me it was a big breakthrough. :lol: