Hi Our DNS Manager does handle only 3rd party applications/systems for DNS. Therefore you need to have to organize your own server/credentials to other DNS services provider. For a full list of all modules supported, please visit our wiki: http://www.docs.modulesgarden.com/DNS_Manager_For_WHMCS You can see the list below "DNS Manager Supports The Following Modules:".
I think you're on the right page here. The module itself is $99. If you need to create the back end -that is on you. Are all 5 servers tied together and synced?