samba - Nov 1997 - NT4.0/Win95 -- connecting w/o user id

Hello;

I have a D270 unix box on 10.20 and have just installed samba using
the default smb.conf file from the examples directory.

What config data in needed in the smb.conf file so that persons
on NT4.0 and Win95 can connect without specifying a usersname
and password.

Oh..I forgot to mention my unix box is on HP unix (HP-UX)

thanks much;
Ike Leong