NOTE: Be sure to have your RAID driver disk ready.
Start the Windows install
Press F6 to specify additional drivers
Insert driver disk
Press S to specify the drivers for your RAID controller and continue with the installation
After the install is complete, boot to the UBCD4Windows
Copy all the files from the single drive to the RAID drive -DON'T CLONE/IMAGE THE PARTITION
Reboot to the RAID drive
You should now have a perfect copy on your RAID drive with all the updates (if Windows was up to date on the single drive).
– Main.FredPettis - 21 Apr 2009