What do you mean 'won't install drivers'
Does it ignore you driver disk? Does it fail to recognise the camera?
Explain what you did and what if any error messages you received
Also, double check that you have the USB 2.0 updates for XP, should this camera require them. This could also be a showstopper
The more detail you provide; the better the chance your problem will be solved by others who can't see what you've done or what appears on your PC monitor.
