So to summarize, finally is there a solution to boot BartPE from USB key with USB 2.0 speed while the BIOS boots only with USB 1.0/1.1 speed ?
Yes, there is, still fully and utterly experimental but working , here is the link to the "XP Kansas City Shuffle":
http://www.boot-land...topic=4186&st=5
kolk is trying to find another (maybe simpler) way.
jaclaz