Dual boot XP/Vista

Hello, I'm attempting the subject installation. Putting XP on my new Vista machine. I've solved an audio driver issue but am now met with the following message:

The software you are installing for this hardware; Standard Enhanced 
PCI to USB Host Controller, has not passed Windows Logo testing to 
verify its compatibility with Windows XP. 
If I answer either yes or no the installation hangs up and I have to reboot with the power switch. Is it possible to download a driver for the PCi to USB controller that XP would recognize?
Thanks for listening
wauchop