at the dome light wire(the wire from the foot area light) (its the door trigger wire from the alarm brain)
85 - 12v+
86 - negative trigger wire from light
87a - not used
30 - ground
87 - trigger wire from alarm brain
if the shop has access to DirecTechs websight (all authorized retailers do) it has a very specific note about this issue with instruction how to do it.
this actually sounds like a different problem, since it is happening before the computers go to sleep, it may(just a guess) be because they tapped in to the actual door trigger wires which is the normal way to do it, but wont work with the type of door triggers these cars have.
all the newer systems(5701, 5901, and 5902) this year have finally added a programming option for N/C door triggers, yeaaa!