mcdssn

I know some of you out there have installed the Nexus 7 in the factory receiver control area and I have looked around the forums quite a bit on this topic. I'm curious if anybody with the TECH package has done this. My question is what do I need to do to have the HVAC and audio source display onto the top navi screen? Also, will my backup camera still pop up on the top navi screen after I do this? I think I understand the process of installing everything and I have most of the parts I need to complete it but that's the one thing I'm still confused about. Any input would be greatly appreciated. Thanks!