Going back to OEM OS on Mini 10v

[FWP]

I have a 10v that I successfully setup a dual boot on using the Chameleon boot loader to let me choose between OS X and Windows 7 at boot up, but now I want to sell the laptop and return it back to the stock Windows XP OS before I do.

 

I used the WinSetupfromUSB utility to get Windows installed on a bootable USB stick, but when my computer boots up it immediately loads the Chameleon boot loader and no matter what I do I can't get it to boot from the USB. I want to format the drive and just install the Dell XP disc on it and be done with it.

 

Help!