If you already have a RAID array setup then you’ll have to add a PCI SATA card for your burner, or use the PCI SATA card for your hard drives and set the boards SATA controller to non RAID and IDE mode and connect the burner to this port.
If you don’t have a RAID array setup already and you have two hard drives and intend to use RAID 0 for better performance. Be aware, this is a dangerous setup. If one hard drive fails, you lose the data on both drives, as the data is across both drives.
Vista and i believe XP offers a software RAID solution, i have never used it, but i expect it also to be dangerous.