Ooops. Let's try that again.
You can use Cyberlink Power VCR II or Intervideo's WinDVR. I tried both of these applications with a VisionTek's GeForce 4 4600. They both work pretty well. I had Direct TV fed via S-Video and noticed some flicker when viewing text on screen or straight lines in on-screen menus. Overall, its not bad. The video quality is certainly better than my ATI TV Wonder.
Does anyone know if that flicking thing is a known problem?