This link is posted in News but it should be here too

http://hydra.hq.linuxtag.net/~kester/knoppix-customize/

This software give me the idea of hex-editing ISO images directly with any hexeditor (windows or linux)

It is easy mini-customizing knoppix (or morphix)

For ex.
If you want spanish language and 640*480 change the following paragraph

DEFAULT vmlinuz
APPEND lang=us ramdisk_size=100000 init=/etc/init apm=power-off hda=scsi hdb=scsi hdc=scsi hdd=scsi hde=scsi hdf=scsi hdg=scsi hdh=scsi vga=791 initrd=miniroot.gz nomce quiet BOOT_IMAGE=knoppix
TIMEOUT 300


To something like this


DEFAULT vmlinuz
APPEND lang=es ramdisk_size=100000 init=/etc/init apm=power-off hda=scsi hdb=scsi hdc=scsi hdd=scsi hde=scsi hdf=scsi screen=640x480 vga=791 initrd=miniroot.gz nomce quiet BOOT_IMAGE=knoppix
TIMEOUT 300

It is easy, very fast an works

cheers.