I found something about on :

http://www.es.gnome.org/cgi-bin/cvsw...&cvsroot=GNOME

and there said:

"Now you can either make the final ISO image for burning or you can test it by
symlinking the KNOPPIX directory in a root directory of a partition e.g.
cd /
ln -s /mnt/master/KNOPPIX KNOPPIX
then you can make a boot floppy :
dd if=/mnt/master/KNOPPIX/boot.img of=/dev/fd0
and boot off that, _without the cd in the drive_, when looking for the CD it
will look for a Directory called "KNOPPIX" on /dev/hda1 a2 a3 b1 b2 etc. etc.
if it finds one then it will say "accessing CD on /dev/hda1" and use that as
the CD."