Here is what you do.

FIRSTLY GET A USB plug-in EXTERNAL HARD DRIVE AND BACK-UP EVERYTHING.

Next install knoppix5.1 to your hard drive from your CD.

************
Then copy the downloaded Knoppix.iso into this folder:

/home/knoppix/Knoppix-your-version-and-details.iso

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Then you can play around with you HD install to your hearts content, ugrading and updating as you choose. If/when something goes awry then it is time to use your CD knoppix to resolve any issues and recover data to your external HD

Now that the Knoppix.iso is on your machine (as above in ************* ), you can boot knoppix like so; at the live CD initial boot screen type:

knoppix bootfrom=/dev/hda1/home/knoppix/K*.iso

which is then a poormans install boot and is faster than live-CD and will let you do anything as before from the live-CD eg. resolve issues and recover files, ect.

note that you now have two ways to use knoppix and if your internet connection/peripherals go awry on the HD install you can still use your live-CD and transfer things (like packages.deb, etc) to your HD install.

Remember that the more people testing knoppix on HD install and giving information about problems and testing, the faster it is possible to proceed with the knoppix developement.