I'm sorry if my questions is too noob, but isn't sysvconfig the same as update-rc.d someservice defaults ?
Here is what I did:
Just created start,stop,restart script for proftpd.sh and called it proftpd.sh. Then copied it to /etc/init.d and enter in command line:
sudo update-rc.d ./proftpd.sh defaults
At least everything is working, but I don't know if everything was ok in my actions.