Here's the usual mode:
Q314058 -"Description of the Windows XP Recovery Console"
Another possibility is to have a dual boot Windows XP - Recovery Console. For details, read:
Q307654 -"How to install and use the Recovery Console in Windows XP"
Note
The article it's a little bit outdated. If you already have Service Pack2 installed, you need to use either the CD supplied with Microsoft Windows XP (Service Pack 2 included since October 2004) or you should use a Serviece Pack 2 splistreamed CD using a previous windows XP version and the Service Pack 2 file (either from CD or full download from MS site).
Good Luck,
Cetin
Trying to unweave, unwind, unravel
And piece together the past and the future,
T. S. Eliot