OpenDeploy 5.6 replication farm question

System

I have the need for the following process:
Deployment farm consists of SRV1 and SRV2. I need the deployment to be transactional but I need it to first do SRV1 and then SRV2 if SRV1 completed successfully. Currently it starts the deployment on both at the same time and then waits for the transaction to complete on both to remove the iwnew extension. Any ideas? What we did before was have multiple od config files representing each server and then called one and then the other after but that was not transactional??