to install the driver to windows, you dont have to do it before you install, but you will have to use the Windows Setup Disc... just whack the driver (it should be an executable) on a floppy (for XP) or a USB drive (Vista) start the install process... for Vista, its a fairly simple point and click process... just wait for the screen which asks if you need to install any third party drivers and find it on your drive... for XP, you've got to start the install (or repair) process and hit F6 when you see "Press F6 to Install Third Party AHCI/RAID Drivers" (or something to that effect)... then select the floppy drive and the appropriate driver for your SB
to set RAID up on your mobo, you should just have to enable the RAID function in the main BIOS, then, on startup, somehow (consult your manual, or Google it) enter the RAID BIOS, from which you can create/remove RAID volumes