Hello there!

While many users have problems to get the bootloader working, there should be options for booting the hdd-installed system off from cd-rom.
Therefore there could be an extra kernelimage and initrd-image, for instance named vmlinuz/vminitrd.img. These are different from those that include the normal Knoppix-startup incl. H/W-detection and stuff (ie. starting just nothing ). In my oppinion the sys-linux integration could just be something like:

label vmlinuz
kernel vmlinuz
append initrd=vminitrd.img

(and nothing more, there are many faqs that explain kernel-parameters/options and there also is the help of this forum )
So the user with an screwed up/not installed bootmechanism could just type
boot: vmlinux root=/dev/hdxx
... and were running the installed Knoppix as is, including not to (re)mountall and things.
This would make the Knoppix-CD also an very practically recovery-disk.
Because this doesn't fit on the general boot-floppy there could simply be an floppy-image that includes just this kernel and nothing else.

just my 2 cents and regards, raid5