... there's a section entitled '8/3/2001: ATI...' explaining how to capture from AIW Radeon in VirtualDub under Win2k.
(
http://www.virtualdub.org/virtualdub_news_old.html ).
Also, the WDM-VfW wrapper files -
http://shopgeo.virtualave.net/wrapper.zip - might be useful (mentioned in this article -
http://www.vcdhelp.com/reviews/atiaiwradeon/aiwradeon.htm )
Tony