Zimbra 6, Openldap and Samba Integration- CentOS 5.3

Hello,

I have question about Zimbra 6, Openldap and Samba Integration.

I follow up the tutorial

http://www.cozumpark.com/blogs/linux_unix/archive/2010/02/28/centos-zerine-zimbra-collaboration-suite-open-source-edition-kurulumu.aspx

and my question is 

Why is my CentOS 5.3 no file : /opt/zimbra/conf/slapd.conf.in ??

for my system:
there are /opt/zimbra/openldap/etc/openldap/slapd.conf
[root@zimbra1 ~]# ls -la /opt/zimbra/conf/slapd.*
-rw-r—– 1 zimbra zimbra 981 Mar 2 12:57 /opt/zimbra/conf/slapd.crt
-rw-r—– 1 zimbra zimbra 887 Mar 2 12:57 /opt/zimbra/conf/slapd.key
[root@zimbra1 ~]# su zimbra
[zimbra@zimbra1 root]$ zmcontrol status
Host zimbra1.mydomain.com
antispam Running
antivirus Running
ldap Running
logger Running
mailbox Running
mta Running
snmp Running
spell Running
stats Running

Thanks.

 PS