Boot Ghost USB Maxtor

Can anyone help - I am running XP Pro and Ghost 2003. It appears that
my BIOS will let me boot from an external USB drive (250gb Maxtor in
my case)

I haven't actually got it to boot as I get the ntldr missing message
and my memory of setting up bood disks has faded to say the least.

Ideally, I would be able to put the dos files and Ghost.exe on the usb
drive, boot from it and then use it as the volume to save the image
file on. That way I have a no disks/cds solution for restoring my
system partition.

Any help appreciated.

John