A control network communication arrangement includes a second protocol embedded into a first protocol in a way that modules supporting the second protocol may be aware of and utilize the first protocol whereas modules supporting only the first protocol may not be aware of the second protocol. The second support has a support guide feature. Each alert may identify skin features that have been identified as changed. One or more subordinate programmable multimedia controllers having a matching unique identifier to a unique identifier on the master’s list may be added to the system to provide additional control ports, increase audio or video processing or switching capacity.