The only way I can get /cmg to run in Arch is to

Code:
mount -t cramfs -o loop $FOO.cmg /mnt/whatever (as root)

cd /mnt/whatever

./wrapper (as user)
the fstab /mnt/app does not work because I do not have permissions (user may need be users) ....

Anyway using the above I can get some .cmg working

HTH