The full list of cheat codes are here:
http://www.knoppix.nl/5.3/knoppix-cheatcodes.txt

Have you tried
failsafe

This boots with almost no HW detection, if that works its a matter of going over each HW detection code and
seeing which one causes the problem.

You could also try burning the ISO image on your hard drive to a CDROM and see if you can boot that way.