[CentOS] Windows XP fixmbr from Centos?

I am still dead on my corporate system, and the XP boot CD I brought won't boot. And so far I have not found anyone here at the IETF meeting that happens to have one in their bag of tricks...

So I found instructions on doing this in Ubuntu:

http://www.arsgeek.com/2008/01/15/how-to-fix-your-windows-mbr-with-an-ubuntu...

I have my Centos install CD 1 of 6 that gets me into rescue. Is it able to fix my mbr?

Problem I have with the above instructions (of course I have not tried them as I would have to burn the Ubuntu live CD), is I cannot write anything to the harddrive to store a program to fix the drive (at least that is my reading of the instructions). I suppose I can put a USB drive on the system to hold any temp thing?