ok guys..I hope someone can help me out.

I do my guitar recordings with guitar rig2 which lets me save my recordings on my hard drive. I also have a webcam ( a cheap logitech one) without a mic.
I want to record a video via my cam incl. my guitar playing, but I don't wanna record the sound with a mic...sounds f**** crappy.
So I need a way to record the video from my cam with the sound of my soundcard. Does anybody know a way to do it, some software?

thx in advance
My Rig:

Ibanez RBM - I adore this axe!!
Fender Strat (Duncan PU's + Floyd-Rose)
Washburn Acoustic
Kustom Quad200 Amp-Head
Cusom-made 2x12 Cabinet
Guitar Rig2 (for Recording...awesome!)
Dunlop Cry-Baby
Rocktron Intellifex
Boss SD-1