samba - Sep 2004 - Samba without password

Hi:
I'm sorry my English, I don't write english very well.
 
I work with samba-3.0.0-15 and Fedora Core 2.  My workstations is work in
Windos XP and Win 98, 
 
I use SHARE Settings options.  I try with logging to Samba and the proccess
work, but my goal is to use the eviroment without create users in Samba
(Autentification, transparent enviroment)
 
I try to create a sharing public directory but without login in samba
enviroment, could anybody help me?