Just to save some poor AIW peep out there some major hassles, the 6125 WDM driver dated: 06/22/02 that is currently listed on ATI's website is NOT the same driver that was originally posted back on 06/22/02. But you definitely need to download and install THIS driver, do not use the older 6125 WDM driver dated: 06/22/02 that was originally available on 06/22/02; if you do, like I did, you'll end up with 6 unknown devices because the WDM capture drivers will not install correctly.
One way to distinguish between the two files is by size: the *newer* file is 2,928 KB and the *older* file is 2,814 KB. The icon for the files are different as well but the file name/dates are the SAME!! You would hope that these ATI clowns would make this process a little less painful these days...but it's SOS with these @ucks!!!!
The installation order that I followed which worked perfectly:
1. Uninstall the existing Control Panel, do not reboot.
2. Uninstall the existing ATI display driver, reboot.
3. During the subsequent reboot, ignore the 6 WDM PnP h/w device windows by canceling each of them; you'll end up with the default ATI display driver installed with 6 unknown devices.
4. Install the latest 6125 WDM capture driver (currently posted on ATI), do not reboot.
5. Install the latest 6118 Catalyst display driver, do not reboot.
6. Install the latest 3017 Control Panel, reboot. During the shutdown, click OK on any ATI-related device errors, to be expected. The system should reboot normally and then during the boot process all 6 WDM capture devices should install correctly.