Application Migration From MD-4(7) to MD5(8).

Application Migration From MD-4(7) to MD5(8).

1. How do I migrate a chunky application without having to lose connections to my I/O's that are present on separate Expansion modules but controlled by the head master MD4-(7) when I need to migrate the application from MD4-(7) to MD5-(8)?

2. How do I keep connections between adjustment groups, adjustment parameters, logs and Monitoring channels under the same transition?

3. Basically how can I completely migrate an application contained in an MD4-(7) screen to an MD5-(8) screen without loosing connections to other hardware in the System Layout if I am using a Variance file. 

The purpose is to have 2 selectable headmasters with complete application available on both.