Yes, I thought so too:) But the command is just to run a chainloader,
and adding the option at the end of the line had no effect.
I might try mounting the usb stick in another Linux, copying the file-
system to disk, editing the xen.cfg file (I think that was the name),
and then building a new iso from that. All a bit of a palaver, but
it ought to work.
Thanks for taking time to help.
Mike.