Samba with OpenLdap and ONLY VIRTUAL ACCOOUNTS!

[Alex Pita <newmail@softhome.net>]

Hello openldap experts,

I am using RedHat 7.3 and I need a solution to make samba works with 
VIRTUAL USERS accounts. As i read it from google it's seems to be 
possibile if i use openldap. I'm not having any prior experience with 
openladp software. Reading openldap documentation i could't find how to 
configure samba and openldap to WORK WITHOUT any VALID users SHELL ACCOUNT.

To be clear: I don't want SHELL USERS with different password for 
samba!!!  I want ONLY VIRTUAL USERS (no one shell account) and al of 
them MUST resides in openldap (or mysql or postgress) database with all 
attributes (home directory, UID, GID, user, password, workgroup, domain, 
etc)..... Did someone test this scenario?

Google said that my problem is not well documented and in the past was 
some tryes about this subject. I found also some info about samba and 
pam_mysql plugin. It sounds familiar for me because few weeks ago i've 
configured this plugin to authenticate users for postfix smtp via SQL 
DATABASE, and everithing was ok.

Actually, i want to do the same work with samba, but i don't know if 
openldap can do this job exacly as i want. Also, google said that are 
more projects using samba with openldap support rather then samba with 
mysql(pgsql) support, so i said to try samba+openldap!

Is anybody here which are using samba (as PDC) + openldap support for 
users authentication? If yes, what are the limitations for the momment 
(for ex: is possibile to apply particular virtual soft quota for each 
openldap-samba shared resources? I could't find any answer for this 
question too...)!

Any URL with some howtos about configuring samba to use ONLY openldap 
database ACCOUNTS are wellcome!
I take a look over this URLS:
http://www.unav.es/cti/ldap-smb/ldap-smb-2_2-howto.html
http://www.padl.com/OSS/pam_ldap.html
but i could't find an aswer to my problem.Please help....

Thanks in advance,

Alex Pita