Hi, James.
Technically, the Recovery Console is not "in WinXP". It's a separate
utility (including an MS-DOS-style text-based interface) that we can choose
to run, rather than WinXP.
First you must set your computer to boot from the CD/DVD drive, rather than
from your hard drive. Then put the WinXP CD-ROM in the drive and reboot.
After some preliminary preparation, as though it were going to install WinXP
all over again, you will see a menu from which you can choose "R" to Repair
your Windows installation.
For more details, see this KB article:
How to install and use the Recovery Console in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;307654
The KB article also tells how you can install the Recovery Console so that
it can be started from the HD, rather than from the CD, but if you haven't
already done that, then you probably will need to start it from the CD.
Be careful! Any tool powerful enough to fix this kind of problem is also
powerful enough to create more problems if not used properly. Read and heed
the warnings in the article.
RC