A repair install shouldn't have required a password... like bchur83 mentioned, it sounds as though you booted from the CD and used the first "Repair" option. That doesn't take you to a Repair Install, rather it takes you to the Recovery Console. You should not choose "To repair a Windows XP installation using the Recovery Console, press R", but instead accept the License Agreement... and Windows will then search for existing Windows installations. You can then select the XP installation you want to repair from the list, and press R to start the repair.