download sata drivers for your pc from the motherboard or pc manufacturer's web site.
you may have to enable the sata controller in your bios and make sure your boot order puts the ide drives before the sata drive.
For forever my HDs have been the old standard IDE. I just found a great buy on a Seagate Baracuda PMR 400 Gig HD for 89 bucks, but it is SATA. My motherboard supports SATA and has the connectors. Can I use this new SATA drive with my other two existing Master and slave IDE drives? I hope so 'cause I just bought it.