I get the error "Another instance of this setup is already running. Please wait for the other instance to finish and then try again." when installing the Sigmatel drivers from the Boot Camp Driver installer. I've reformatted, reinstalled Windows XP, and tried to install the Boot Camp drivers again but I still get the error. I tried opening "SigmaTelXPSetup.exe" directly from the "Drivers" folder of the Leopard DVD, but I got the error again How can I install these drivers to get sound?