i think it's only for the older SS7 VIA board tho cuz it has never done anything for me and i've owned the following VIA chipsets, KX133, KT133, now KT133A. I could be wrong, but i myself couldn't find out wtf they did. all my stuff works fine anyhow.
I gots:
1) Umax 1600U usb scanner
2) HP deskjet 842c USB
3) MS intellimouse optical usb
4) Creative Webcam3 usb
all work fine even under win2k, maybe im just lucky