I am going to save everyone some time. If you are trying to install Windows XP, make sure you do a SP2 slipstream build. I must have tried a half dozen times to build XP using the original retail CD with no luck. Once I used the SP2 slipstream, all things were good. Once again, dont' try to build without a SP2 slipstream.
http://www.winsupersite.com/showcase/windowsxp_sp2_slipstream.asp
http://www.winsupersite.com/showcase/windowsxp_sp2_slipstream.asp