Catalyst Media Center is a special version of ArcSoft that is sort of more like the legacy ATI MMC from ATI AIW. It can be used for DVD/BD spec MPEG capturing, but the drawback is that dropped frames are not reported like the latter ATI MMC used for ATI AIW PCIe cards. For that reason, I only use it when in a pinch.
For that ATI 600 USB card. use
VirtualDub 1.9.x, and capture lossless
Huffyuv.
I'm working on the glossary entries lately, and I've noted to include some of this info on the ATI 600 page.