try to get the 4.0 DVD. Start this DVD as Life-DVD; the menue-point KNOPPIX gives you the possibility to create a boot-floppy ( 2 formatted Floppys are needed).
This Boot-Floppy enables you to start a Knoppix Live-CD or -DVD since version 3.4 from the floppy. Then you need to insert the CD and Knoppix will start - hopefully.
I tried this with my installation and it works.