Need procedure to add openldap server in existing ldap setup

Hi Guys I am newbie for openldap.

My customer is having openldap server installed and configured for their environment

Production Environment details - RHEL 5.2 with openldap server 2.4.19

1. I am planning to add RHEl6.3 with openldap server 2.4.23 in the existing setup.

a. How to configure new ldap server to import necesary configuration and schema ?

b. What precautions I need to take to avoid issues with production

2. After adding new ldap server I am planning to do N-Way Multimaster replication on RHEL6 using OpenLDAP by following 

https://access.redhat.com/site/solutions/273533

Will it work or I need to do something else. 

Thanks in advanced for your anticipation and prompt help.

Regards,

Santosh