(As discussed on IRC, this also requires creating /.disk/info - contents irrelevant - on the removable device, and depending on grub.cfg may require copying /usr/share/grub/unicode.pf2 to /media/UsbStick/boot/grub/unicode.pf2 if you want a pretty menu.)
(As discussed on IRC, this also requires creating /.disk/info - contents irrelevant - on the removable device, and depending on grub.cfg may require copying /usr/share/ grub/unicode. pf2 to /media/ UsbStick/ boot/grub/ unicode. pf2 if you want a pretty menu.)