So your motherboard doesn't support SATA? They're pretty common (SATA controllers) and all motherboards today have them. You'll probably have to buy something like this if your motherboard doesn't have SATA interface:
SYBA SD-SATA-4P PCI SATA Controller Card With optional RAID function RAID 0/1/0+1 - Retail
It sticks right into an existing PCI slot.