Oh, now I get it, you made a duplicate of a Knoppix CD, rather than downloading the ISO. You did it just right.

I was trying to say that you can store the ISO on your NTFS partition, boot from the Knoppix CD (or bootfloppies), and tell Knoppix to use the ISO image on your hard drive using the "bootfrom=" cheatcode, specifying the path to the ISO image. The only advantage to running Knoppix that way is speed. It's much faster than using the CD. It's still read-only.

So never mind!