Hi, I apologize if I'm doing this wrong. I have a problem with adding more live 
isos to a usb with grml2usb. I have successfully added grml64-full_2014.11.iso 
to the usb but when I try to add Debian GNU/Linux on top of that, I get the 
following:

root@mybox:/home/mo/isos# grml2usb /home/mo/isos/debian-live-8.1.0-amd64-
cinnamon-desktop.iso /dev/sdb1

Executing grml2usb version 0.14.12

Using ISO /home/mo/isos/debian-live-8.1.0-amd64-cinnamon-desktop.iso

Error: could not find grml-version file.
Cleaning up before exiting..

Best,
Mo