I don't understand how Scott's answer solves Sraber's problem. If his main amp is controlled by trigger 1 on the 990 it's still going to be turned on whenever the 990 is - even if the 990 is only wanted as a source for zone 2. Yet apparently Sraber doesn't want the main zone amp on if he's listening only in zone 2. It looks to me like there needs to be a way of choosing which zone one wants to listen in and turning on only the appropriate amp.
Is there, and I haven't found it? or have I misunderstood Sraber's problem?