Hello ugo (congratulation to paternity*g)

i run exactly in the same problem (working with students too*g).
i tried hard to find a solution, but i had only luck with two workarounds:

1. the fuse-ntfs-thing did work-but, as u said, it takes much effort to test and document.
2. the unionfs-automated-thing does work for me IF i choose the options while starting knoppix like this:
[X] home
[ ] system
[ ] overwrite
[ ] init
...so the homedir is persitent, but /etc and global systemconfig isn't.

i think the problem with choosing [x]system is, that the KNOPPIX.IMG-file or the whole ntfs-partition doesn't unmount correct while shutting down knoppix. At least i wasn't able to umount KNOPPIX.IMG or the ntfs-partition by hand (always busy-errors).
i would be glad if we could find a better solution (saving systemconfig included) together.

Ciao,
Rammel