WOW! Knowles - I'm surprised you didn't do a simple google search prior to posting that... you continually demonstrate your lack of knowledge in this area. Here you go:
"All that’s needed is a bootable USB Flash drive with at least 256 MB of storage capacity and a Windows Setup CD. Using the program Bart PE Builder (Freeware), you can install Windows XP on the flash drive, along with other software as needed (and as available space permits)."
So much for your "can't be done" statement... LOL!
The above is just 1 sample - there are MANY programs that will enable windows to run on a usb key... Somehow I don't think that Jimmy has anything like this however...