have just installed a new hard drive 350gb and installed the "Reinstallation DVD Microsoft Windows XP Center Version 2005 with Update Rollup 2" on the hard drive (got the cd from dell). It goes through the instalation process but insted of booting up windows after the reboot it just goes to a blank, light blue screen (not a BSOD)
Probably a driver issue (you are installing from a CD from some time ago)
See if configuration settings in setup look ok.
See if you can boot into safe mode - update display
driver in device manager.