Well, I tried to change it... without success. But I managed to answer 2 of my 3 questions:
1. I could "tell" inetd not to listen on port 21(in config file). Or I could make proftpd run from inetd,and not standalone(I thoungh it would require some special skills to do that
2. In the fourth column in fstab add umask=022, and you will have r-x rirhts to the mounted file.
3. I still need some help on this one. Anyone