Can I boot and run windows XP from a USB flash memory stick?

"good old BartPE is your friend:

How to run Windows XP from a USB stick

p.s.: preparing a USB flash drive with BartPE (or any Windows installation disk for that matter) has just gotten easier, thanks to this nifty little tool: WinToFlash

(credits to Lee M. over at downloadsquad.com for this nice find)"

"Yes, it is possible with winxp. I've tested and run winxp on usb for many times and it worked well.

The concept is simple, all you need is a vhd disk image which contains a winxp (full or mini is up to you) installed with winvblock drivers.

You can you oracle virtualbox to create the vhd file.

After all, you use grub4dos to boot the vhd image.

I found a full article here : http://www.linuxbyexamples.net/2012/08/How-to-install-and-run-a-full-winxp-on-usb-disk.html

Hope it will helpfull.

Cheers."