Especially for testing purposes it would be handy to install Grml systems to loopback mounted file images.

This currently fails because of the way partitions are handled:

  % sudo grml2usb grml64-full_2013.02.iso /dev/loop0p1
  [...]
      check_boot_flag(device)
    File "/usr/sbin/grml2usb", line 320, in check_boot_flag
      with open(boot_dev, 'r') as image:
  IOError: [Errno 2] No such file or directory: '/dev/loop0p'

We should find a smarter way to identify partitions.