I came across BartPE by accident and wondered what it was. Looking at Wikipedia it defines BartPE as:
"BartPE allows a user to boot Windows XP/Windows Server 2003 from a CD-ROM regardless of the condition of the installed operating systems on the internal hard drive. This means that the user can, for instance, recover data from a failed operating system installation, or reset a lost administrator password."
As such this is a brilliant admin and disaster recovery tool. There is also a small industry of numerous plugins to work with BartPE which look very useful. Full details at Bart's Preinstalled Environment (BartPE) bootable live windows CD/DVD