|If you disconnected the IDE hard drive that has Windows on it, how do you expect the computer to boot? |
If you are running SP3 on WinXP you should be able to partition and format the 160GB SATA hard drive from within WinXP.
A 160GB SATA is probably SATA I speed so there would be no advantage to running Windows on it. Use the SATA for programs and data to expand your storage.