Hi,
not sure what version of Debian you're running but on my 7.0 box it is /etc/rc2.d/S07samba.
You should be able to use any of the standard tools to disable it. Eg
If, you really don't see it in at /etc/rc2.d/S07samba, check what runlevel you are really on (it may not be 2), and also look at the scripts in /etc/init.d. Eg.
Code:
grep -E 'smbd|nmbd' /etc/init.d/*
Evo2.