I'm not sure if that would work. Even if you didn't make money out of it, selling CDs with Jazz Jackrabbit stuff on it is probably still illegal, even if the money is for a text file or whatever.

Actually, it could be possible that, even though officially only the text file is paid, someone buys your CD for the Jazz levels. You still made money using Jazz Jackrabbit. So, no, Sers' idea wouldn't work.