I have got windows xp home striped down using tools from Lite Pc which is called Xplite and it does a good job as you can add thing back in if you removed something that you later need.
I have done the same setup on a pii 500mhz with 256mb of ram and it was very slow comperd to Alex Board.
When I get back form hols I am going to try and get my hand on fit-pc and the devloping tools for windows xp embedded with license (not the trial version) and buy some run time license for windows xp embedded and build it for the fit-pc and the Alex boards
devloping tools are about €800 and the runtime license are about €40 well they are $50 each.
I have a friend who also whats a carpc. I will build a few just in case more of my friends what one.
Just started me carpc here is a tempory link to pic of it http://mcgcs.net/carpc.
my worklog http://www.digital-car.co.uk/forum/s...027#post249027