I'm installing Windows VISTA RC1 x64 version from DVD (downloaded the ISO
image). I clicked the option to install additional drivers out of
curiousity and found that I could not return to the installation. The
BROWSE and RESCAN buttons were available, but the NEXT button remained
grayed out. There were no additional drivers required to install. I did
like the option where you can install drivers from a USB device, at least I
assume that is what that feature does. I had to click on the X to exit the
installation and start it again.