Use Truck Input for rear hatch?

I am going to be installing a Viper 791 in an 04 Escape and I'm planning out everything right now. On thing I just realized is that the liftgate (and liftgate glass) are considered a 5th (and 6th) door. So, the truck doesn't really have a trunk per-se and therefore the trunk input on the alarm would not be used. However, I'd like to be able to utilize this Zone so my fob will be specific in telling me the hatch is open, and not just another door. Ford's wiring diagram indicates that there is a voltage from a GEM to ground through the liftgate, and liftgate glass. Therefore, when one is opened the circuit it broken. (Thus, me splicing in would get me a positive (+) voltage when either are opened. Seems to be a simple, unless I am overlooking something. My question is this: In order to use the hatch and glass for the trunk input, I have to isolate it from the domelight system (which would indicate a door being open), this will cause my domelights to not light when the hatch is opened. If I do not isolate the hatch, my FOB will indicate trunk and door being open. Because of the GEM module just creating a voltage difference and no current, I'm not sure diodes would work, but PLEASE correct me if I am wrong.

Thanks for your input! I understand that if I tap into the negative trigger hatch wire and run that to the alarm, it will show the trunk as being open, however, won't it still show that a door is also open?