[CentOS] Breaking Windows XP user password?

Granted this is not a UNIX system, but in case there is a UNIX tool to accomplish the goal...

I am looking for a bootable CD/DVD (or application to be placed on a CD/DVD to be made bootable) that can let me mount a Windows XP drive/partition (SP1 or SP2), and force-crack the admin password (even if admin account name has been changed, but I know what it has been changed to). The application cannot write to the hard drive - only mount it read-only, read the password file into ram, and show the cracked password.

I know I can use the pnordahl utility to try and force-change the password, but I actually want to crack it.

The utility should be free.

This is a legal request.

Thanks for leads.

Scott