I had the same problem on the KT7A. Drivers were on a floppy disk but still wouldn't load. Just connect your drive to the IDE port first, do the install, then install the Highpoint driver in W2K. Shut down, move the cable over to the RAID connectors and reboot. Configure the drive you will boot from by pressing <CTRL-H> during boot. Load W2K, if no problems, shut it down, reboot and create your RAID.
Worked for me, hope this helps.