[Samba] users/passwds

[P. Jourdan]

Could somebody please explain just how one is supposed to set up samba 
users, groups and passwords so connections can be established to Win2k 
clients to connect to FBSD samba server for file sharing and to use cups 
for printing.

I am afraid that the manuals and config files and various examples I have 
found on the Internet are quite confusing.

How is the Windows username/passord related to samba access? Must the same 
username/password be created with smbpasswd?
What users/groups need to exist or be created on the Unix machine? Are any 
created automatically by samba installation?
What users/groups need to be set up for "guest" access?
What is the difference between smb.conf entries "public = yes (or no)" and 
"guest ok = yes (or no)"?

Phil