Especially as the usage instructions for "flash-knoppix" are contained in a section headed "Computers without DVD" and state "just add the name of the .iso file as commandline parameter to flash-knoppix"
Thank you for this hint. Therefore I looked over the script "flash-knoppix" in the different Knoppix versions and found since V7.4.1 a new funktion within the script
Code:
usage(){ echo "Usage: $0 [-a] [-f] [-m i|p|n] [-p mb] [image|dir] [target_device]" >&2
 echo "       -a            Allow fixed disks" >&2
 echo "       -f            Force overwrite, no questions (batch mode)" >&2
 echo "       -m i          Method: Create overlay image" >&2
 echo "       -m p          Method: Create overlay partition (recommended)" >&2
 echo "       -m n          Method: No overlay (read only)" >&2
 echo "       -p mb         Overlay partition or image size in MB >= 200"  >&2
 echo "       image.iso     Loopmount source ISO file" >&2
 echo "       dir           Source data directory containing files" >&2
 echo "       target_device Destination block device (flash disk)"  >&2
 exit 1
}
You can see the possible additional parameters with
Code:
flash-knoppix --help
With elderly Knoppix versions this doesn't work. In the next days I'll supplement the Wiki.