I was with you, but then you lost me on the zone 1 front and zone 2 rear...does this mean with programming that it may be possible? I haven't seen other AVIC units in person that have seperate A/V, so I'd guess an option would need to be added to the GUI as well.
Sorry, what I meant to say was until we know how the software talks to the uCOM device, which in turn sends commands to the e-Volume unit for source selection, there isn't a known way to do multi-zone. And looking at that block in the schematic, there is no indication that there is a way to split the audio output across two zones to begin with. It's a black box in the schematic and since software doesn't talk to it directly I'd consider it *highly* unlikely that even with GUI changes you'd get multi-zone audio (the uCOM unit may never send the commands you need it to, since it seems to be a fixed-function device with no firmware you can change). You can keep wishing, wondering, suggesting and all that here on the forum, but I really think if you need it now it's time to pull the kit, sell it on eBay and get a unit that lists mutli-zone support on its box.
I thought it'd be cool to have, but by no means something that I'm willing to pay for via upgrading to a different unit. Sounds like it'd be more trouble that what it's worth.