samba - Apr 2007 - dual-head patch from IDEALX / Master/Slave LDAP

Hi, 

I'm trying to set up a master-slave LDAP-SAMBA configuration.
This is from smbldap.conf:


#Notes: to use to dual ldap servers backend for Samba, you must patch
# Samba with the dual-head patch from IDEALX. If not using this patch
# just use the same server for slaveLDAP and masterLDAP.


So ,is it enought with setting up the folowing directives in
smbldap.conf ? : 

slaveLDAP=slave.ldap.server
masterLDAP=master.ldap.server


Do I need that "dual-head patch from IDEALX" that I can't find? 

Shouldn't I too to set up the "replica" statement in sldapd.conf
on the
master server and the "upadtedn" statment in the slave ldap server?


Thanks.