just what i was looking for.
would this work with the xp cd that comes with the sammy, ive made an nlite version from the cd so i presume just do excact same but use xp instead of vista.
xp is a lot more tricky... there is a guide here.
http://www.liliputing.com/2008/04/install-windows-xp-on-mini-note-usb.html
it does work though, have a xp 'lite' bootable pen drive that works fine...