guess, it takes some time to go through this
No, not at all, if your computer supports network boot. Just check your BIOS for boot options. Do you have a separate network interface card (PCI slot) or an onboard solution?

If the network boot doesn't work, take a look at "ISO boot from ..." in the hdd install section of the board. If I remember it correctly, somebody created a boot floppy that loads a KNOPPIX files from hard drive. That was possible with older Knoppix versions up to 3.4.

There is more information on alternative install methods in the documentation section, e.g. "poor man's install".