I read the two wiki articles on HD install. The older seems to be somewhat dated, while the newer does not have much detail. So, I improvised. Clearly, I am still doing something wrong. Pointers would be appreciated.

I found that the /tohd=/dev/sda1 cheat code did not populate the C:/KNOPPIX directory on a USB live boot.

I then manually copied the linux (4.3 MB) and minirt.gz (930.8 KB) files to the C:/KNOPPIX directory, along with the background.jpg, knoppix-cheatcodes.txt, both logo files, and index_en.html.

Next, I booted Crunchbang (Debian Wheezy) and prepared a 40_custom file in /etc/grub.d. Contents --
Code:
menuentry "Knoppix 7.2" {
set root=(hd0,1)
linux /KNOPPIX/linux no3d nostartsound tz=America/New_York
initrd /KNOPPIX/minirt.gz
}
I then did "update-grub" and rebooted. I selected the Knoppix line in the grub menu and got lots of boot message lines followed by --
Code:
Searching for Knoppix 7.2
Waiting (USB)...
Could not mount disk to /mnt-system.  Starting debugging shell.
Note that I used "/KNOPPIX" rather than "(KNOPPIX" on the minirt.gz line, which differs from the wiki. I believe that the wiki is wrong -- http://knoppix.net/wiki/Category:Har...e_Installation
Code:
menuentry "Knoppix" {
set root=(hd0,1)
linux /KNOPPIX/linux (.. other boot-parameter ..)
initrd (KNOPPIX/minirt.gz
}