I'm not sure that will even be a problem. I'm using XP at the office as well on a computer with 1 gb RAM.
Just to be clear, the way an OS uses memory is that it paints an array across whatever is available. The maximum possible memory that ME could use is 512mb. XP is 2GB.
My point was that you could put 200000GB of ram on a window ME computer, it will still only use 512mb of it.