[Samba] Samba as PDC and file server using ACLs

[Bruno Pirajá Moyle]

Hello sambers, i'm trying to configure a samba server (3.026a) as a PDC 
and as a file server using system's ACLs.

1. Where samba stores the users and groups domain information? Is in the 
/etc/passwd?

2. MUST i use winbind to successfully use ACLs? If the samba is the PDC, 
why should i have to use winbind? There is no problem to me to keep 
linux box user and groups accounts.

3. Someone know where a find the ACLs options official guide?

Thanks again for everyone

Bruno