Snapz Pro X 2.0 is due out shortly from Ambrosia Software, and it supposedly has GREAT video capturing and audio capturing. It'll cost like 60 dollars I think, but it'll do the trick.
I recall reading an email I get weekly with Mac tips. It had directions on how to do it, but I deleted it after reading it and don't remember what it was. I was hoping someone around here knew of it.
Originally posted by ZenPirate search over at ipodlounge.com, they have instructions in the forums
I'm not near my mac right now, so I can't get the direct link for you.