|I just ran into this problem as well setting up my Gateway computer. I have one IDE slot that has the DVD burner and CD drive chained in a master slave configuration, and a 200gig SATA hard drive.|
There are 3 more SATA slots on the motherboard for additional devices, but I don't want to throw away my year-old 120gig IDE drive. So I did some research on the internet and found that they make an SATA to IDE Converter. For about $20 bucks you buy the connector and attach it to the back of the IDE Drive. The other end of the connector is a SATA plug. Attach the appropriate power source to the drive, get an ATA cable and plug it into the 2nd ATA Slot.
The boot order is determined by the number on the motherboard slot. Mine is numbered SATA-0, SATA-1, SATA-2, SATA-3. So I will plug my "Slave IDE" drive into SATA-1 since SATA-0 has my primary SATA drive already attached.
Gateway couldn't confirm this would work. They never heard of the gizmo.
You can find it here, but I'm going to check out the computer stores later today to see if they have one.