As far as I have read but not sure what the script name is for squashfs m8
EDIT:
thought I found the script but no joy:
/tmp/root/lib # mksquashfs /tmp/root/lib/libstdc\+\+.so.6 /lib/libstdc++.so.6
Could not create destination file: Read-only file system
looks like mksquashfs is to make the actual file system but does not allow edit. I read somewhere that cryo sportster has a built-in editor but i believe that only applied with cryo 1.0.2 Ultra1.3 - i'm running cryo 1.0.2 Ultra1.4b
It's in the dev menu