You may also try this way to boot Knoppix 4.02 from a USB drive: http://www.knoppix.net/forum/viewtop...?p=93758#93758
This thread also describes how to run knoppix from the hdd without creating a new partition for knoppix and without touching the mbr or the boot sector of your disk/partition. This is a very clean way and much faster way to run Knoppix than from the cd/dvd/usb. Please give me some feedback and let me if it works for you.
Best Regards, Gilles