Welcome to the forums, humpe! (nice name, btw

)
Essentially you are on the right track with CyberProducer in that you need a piece of software that captures video. You can either use ATIs own MultiMedia Center off of their website (might even be on the CD that came with the video card), or another piece of software like Ulead VideoStudio, Adobe Premiere, Blaze Media Pro, or even VirtualDub.
In any case, you might be interested in
THIS page which directly talks about ATIs MMC, and
THIS page that talks about VirtualDub. Actually, you might want to give the whole article a read as it deals with video capturing. Either way that article should get you going.