Handy tip I have just discovered - when you're in Windows XP and want to do some stuff in a dos box don't invoke the dos box by going Start->Run and typing command. Instead do it by going Start->Run and typing cmd. The former seems to invoke a stone-age version of a dos prompt that doesn't like paths with spaces in them so you can't use cd "Program Files" for example. It also won't let you reselect the last command you typed by pressing the up arrow key.
