*WARNING* You will be repartitioning and reformating your hard drive in the very near future. You will lose EVERYTHING on your hard drive. Everything! Nothing will be left. If you want to save ANY file you must do it now, so go save files.
You'll need either a Windows XP or Vista install disk. Go get yours now.
You'll also need a motherboard that has a RAID controller built in or a RAID controller adapter card and a RAID controller driver for whatever OS and controller you are using. Do you have both of these?
If you're using XP you'll also need a floppy drive and the RAID driver to be on a floppy disk. With Vista you'll need a floppy drive and a floppy with the RAID driver or a thumb drive, flash drive with the RAID driver on it. Go get this now.
Let us know when you're ready.