ife got this one all the time:

Your /etc/fstab is not yet prepared for mounting .cmg images.
As root, please make /mnt/app writeable and add the following lines:
################################################## ##############
/mnt/app/1/image /mnt/app/1 cramfs,iso9660 user,noauto,ro,loop,exec 0 0
/mnt/app/2/image /mnt/app/2 cramfs,iso9660 user,noauto,ro,loop,exec 0 0
/mnt/app/3/image /mnt/app/3 cramfs,iso9660 user,noauto,ro,loop,exec 0 0
/mnt/app/4/image /mnt/app/4 cramfs,iso9660 user,noauto,ro,loop,exec 0 0
/mnt/app/5/image /mnt/app/5 cramfs,iso9660 user,noauto,ro,loop,exec 0 0
/mnt/app/6/image /mnt/app/6 cramfs,iso9660 user,noauto,ro,loop,exec 0 0
/mnt/app/7/image /mnt/app/7 cramfs,iso9660 user,noauto,ro,loop,exec 0 0
################################################## ##############

de /mnt/app is writeable and those exact same lines are in it,
i'm using this with knoppix 3.7,

any help would be really apriciated... thnx,

Leipe_Po