windows xp - How to boot from a USB device using an ISO image

I want to re-install Windows XP on my laptop.

I have the ISO image for Windows XP.

How can I boot from a USB device using simply my ISO image of Windows XP?

My laptop is an IBM T42.

If you are running Windows Vista, see the link below (but this doesn't work for Windows XP)

Boot and Install Windows from UBS thumb drive