Well there is more than one program that can do it, I just used Windows Movie maker. When you are selecting what device to use (to capture video) just select Ati Rage Theatre. The rest is pretty simple like setting up audio. Thats for Windows movie maker. You can also get one from Ati's site...can't remeber at this moment what it is.
I think, Ati Multimedia Center. Hope it helps.
-Dan