Thanks for the reply.
You can control any other MD from the MD your actually using... just change the room your Orbiter is controlling and set it to the room you want to control. Then the Orbiter you are in front off will remotely control the features of the other MD.
If I wish to use my Harmony remote (or any other universal remote, for that matter), how are the signals received? because it's an infrared device, there needs to be some sort of receiver. On my current setup, I use the receiver that came with my PVR-150 card. None of my devices have a serial port, so I am not able to control them with that.
That's really what i wanted clarification of: that I would still need an infrared receiver on each MD to control it... is this correct?