http://www.informationweek.com/news/windows/showArticle.jhtml?articleID=177102101 (http://www.informationweek.com/news/windows/showArticle.jhtml?articleID=177102101)
"Fred Langa offers a step-by-step and illustrated guide on how to boot XP from an ordinary USB drive."
If it works with WinXP, why not eCS?