On the picture, the second option from the bottom: grml32 - Persistent mode

Find a detailed description here:
http://wiki.grml.org/doku.php?id=persistency

It adds the boot option: persistent=nofiles

This should activate the debian package 'live-boot' and mount the filesystem
labeled 'live-rw' instead of tmpfs to /live/cow

but it doesn't

so my suggestion was to use the parameter 'persistent' instead of
'persistent=nofiles' according to the 'live-boot' documentation to make it more
reliable.
the '=nofiles' is optional anyway and should make the scan for the label a bit
faster, but it's useless to have a faster but non-working option.

if i delete the '=nofiles' from the commandline via <TAB> it works perfectly