Hello,
I hope that this post is helpful and not too late. Here are 2 links:
http://www.usbman.com/Win%20NT%20USB%20Guide.htm
- USB guide for WinNT 4
http://www.digi.com/products/usb/watchportv.jsp
- First USB Camera for WinNT 4. I'm thinking of getting this later on.
Good Luck.
Dennis