My question re NTFS was not why you use it, which you had explained very clearly. It was why you had done the NTFS-formatting in Linux, which may work well, but in no way can be considered as foolproof.

In order to run Knoppix correctly, you need just one partition that works fine. As I wrote, you can just copy the KNOPPIX partition from an USB media install to the actual partition, and use the fromhd cheatcode to use just that partition, and nothing else. Printer setup in plain Knoppix (no hard disk system installs, just the Poor Man's Install I refer to here) can be done via http://localhost:631/, with no particular authorizations needed for me.