Can't set up Raid

I have an Asus p5vd2-x Mb which I had set as Raid 0 with 2x 1TB hard drives on a P4 processor. I changed the Processor to an core 2 and added a 80Gb hard drive to run as the OS drive. I now can't set up my 2 big drives to raid. They have been reformatted. If I have the drives set as Raid in the Bios I can access the Raid utility and create the array. But windows doesn't recognise them as Raid, and they show as SCSI drives. If I switch to IDE they then show as sata drives but I can't acces the raid utility tocreate the Raid Array.

I have tried disconnecting the OS drive and reloading but the system asks to creat Raid Drivers from Floppy, which I can't do as I have no floppy drive. I had no problems when I first did it, only since doing a complete reinstall and changeing the CPU.

All help and suggestions would be greatfully received