Hi, I bought a 2013 Tribeca. It does not come with the rear entertainment system. I see that it has the blue tooth phone thing on the ceiling, the rse aux button on the dashboard. My question is can I just buy an oem rear entertainment system from a donor car and put it in my car? Would I need to buy a new roof rope to go with it, or would my current roof rope fit it? I realize I will need to cut my headliner to fit the rear entertainment system. Is there anything else I need to do? Thanks!