any computer gurus here?

Help, I got a Promise SATA controller on my laptop motherboard and tried to install a 2nd HD in RAID 2 (striped) and lost my windows, tried to reinatsll XP from a boot disk and it says there are no disks! ran Fdisk and it sees array and says functional but I guess I need to format it? From what, a floppy? I got a USB one I can use. Didnt think it would be this hard. Seems WinXP needs the SATA 378 promise driver off a floppy as its not native, loads up fine but I got BSOD whenever I try and instlal it now. Stumped.....would Win7 install? I got a Win7 boot disk also but this laptop is XP specific in a few features. Alienware M7700, older but badass none the less.