wterry,
It depends on WHERE you put the alias for the hard keys. Putting a hard button alias (or learning a code) in SYSTEM PROPERTIES (under home) is global and the hard key function will be present in ALL devices.
Putting the alias in DEVICE PROPERTIES will make the hard key execute the command, but only for that device. It will also over ride any global hard key setting, but again, only for that device.
Hope that helps,
Jim L