Gamecube to PC!

Mmmm I’m so confused, I looked into some electronic equipment to get my gamecube to connect to my vid card.

Except that my vid. card doesn’t have inputs for those red white and yellow connectors. (What are they called?)

I was looking at the Pinnacle PCTV but thats way too expensive, I don’t need to record this stuff… I just want something that will connect to my gamecube and then connect to my PC… whether its through a USB cord or my video card.

I saw this thing called an RF modulator… whatzit do and is it what I’m looking for?

<-- digital video noob

Oh and I found this but I don’t know if its what I want:

http://hauppauge.com/Pages/products/data_usb.html