The raid is only on the SATA connections. You can use the SATA-PATA converter, but that usually causes some latency in the conversion and slows your drives down a bit, though if you're using raid that wouldn't matter.
XP 2500+ Barton
2x512MB Corsair PC3200
MSI GF3 Ti500 w/64MB DDR
2x80GB 7200RPM Maxtor
My computer is bigger than your computer....