hi, I installed ubuntu 7.10 on a 16GB USB drive on my laptop which has only windows xp on the HD. unfortunately it seems that the ubuntu grub installer did install part of grub on the HD. this means I have to keep the USB key connected at boot time, in the bios select boot from USB-HD and then I get the grub menu (boot linux or winxp). if I remove the key the machine is unbootable. I would like to boot windows when the usb key is not connected.now I fixed the 
 HDs MBR by using the winxp CD and entering fixmbr. but if I try to boot linux from the USB stick it does not work because part of grub is missing.
 any idea how to fully install grub on the USB key ?
 without reinstalling linux on the usb key from scratch.  thanks for info