Thanks Buzz for the reply. I call tech and the helped. I installed the 460250iks keypads and it was in single zone. The instructions that come with the 4602 are not for the FM keypads. One ? for you is there anyway to change sources directly? This customer has an MX-850rf remote. The MUR2e doesn't like the FM keypads(can't access the tuner). Does the new 5066 directly control the sources? Tim
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