iRedMail Replication (Ldap+roundcube)

Hi,

I just configured iRedMail server using below stated HowTo:

iRedMail: Build A Full-Featured Mail Server With LDAP, Postfix, RoundCube, Dovecot, ClamAV,SpamAssassin, DKIM, SPF On CentOS 5.x

I want to create a backup replica of the server with ldap replication as well as roundcube but I am unable to find out any howto.

Can anyone help me out in this?

Thanks in advance...