Hi punkpaddy,

Sorry, it is not possible to add files to the KNOPPIX CD.
(Without compleatly rebuilding it.)
K --> KNOPPIX --> see configure menues.
A few setting can be saved on a floppy but saving
the persistent home to a USB stik, a portable USB
hard drive, or a second CDWR disk are possibe.

http://www.knoppix.net/docs/index.php/FaqUsing

Best Wishes
paradocs