OK, either I'm extreamly confused, or your overlooking something very basic with the Marantz receivers.

THe Default/sample Marantz rc5200/9200 ccf files include discrete ON and OFF for zone 2. When Zone 2 is Turned ON, then next xx seconds of the receiver default to ZONE 2 commands from the Front IR. Minor obstical is that if ZOne 2 is alreay on, it does nothing.

SOOOOOOOOOOOOOOOOO

In your Zone 2 macros, they need to be "Zone 2 OFF" (Command will do nothing if Zone 2 isnt on), Delay 1 second,"Zone 2 ON", "INPUT Select" and this will set the Zone 2 Input without effecting Zone 1.

No Xantech boxes or stripped carriers or Multiple RF recievers.....

Imp