Why do you not just chainload LILO by using:
Code:
other=/dev/hdc
        label=SUSE
In your lilo.conf on the hda knoppix install then assuming that you have your SUSE lilo in the MBR of the hdc you will get another LILO screen from the SUSE lilo.conf and you will be able to boot. If you have installed the SUSE lilo to the / partition then use hdc3.