Okay, here's the deal. I'm trying to install an older build of Windows XP Professional over top of the one I have, since I currently have (for whatever reason) a build of WinXP containing the PREVIEW version of Service Pack 2. My Preview Version of SP2 is, for whatever, reason, unable to be uninstalled. Also, for whatever reason, Windows XP will not allow me to install an older build of the OS without booting from CD. However, when I try to boot from CD to install, WinXP setup cannot recognize my hard drive. It is a "HDS72251" 160GB SATA hard...