Booting your PC from a USB drive

Here are some links, if you want to find out how to boot your PC from a USB drive using Windows:

Fred Langa (From information week) offers a step-by-step and illustrated guide on how to boot XP from an ordinary USB drive.

WinUSB is a free tutorial which allows the user to run a complete Windows XP version on an USB device/stick. This tutorial is some kind of manual which you have to follow, in order to let your modified Windows XP run on your USB device.

Another Windows XP on a USB drive tutorial here. After completing this tutorial, your Windows XP install should directly boot off your USB-drive, and be fully upgradable, DirectX games will run, all apps i tested work like normal, speed is the same as with a real HDD (you need USB2 though) - so it is in fact a fine solution as far as i can see.