If I'm not mistaken, there are computer resellers out there shipping PC's without a floppy drive.

Also, there is a utility out there, can't quite recall the name although it's on the tip of my tongue, which will allow you to customize an XP install disk to include whatever drivers you require. I believe that you can include the RAID drivers, burn the customized bootable install disk, and you're on your way.

I think the application is called BartPE... although I could be wrong.