To get samba started at boot you'll need to put a link to /etc/init.d/samba in /etc/rc5.d.

so either in a terminal window or a console as root do the following:

ln -s /etc/init.d/samba /etc/rc5.d/S20samba

you can start samba manually by using the following command (as root):
/etc/init.d/samba start

HTH

rock