No, Tone's kit doesn't address how to get both doors to unlock on one push of the button. Someone posted a how-to last year, I believe. This is all hazy recollection and speculation, but...

The mods are in the alarm box wiring - there are two outputs from the alarm box, one that activates on the first push, another that activates on the second push. Normal wiring has the driver's door lock connected to the first, and the passenger door lock connected to the second. To wire in the rear door, you would hook both front door locks up to the first output, and wire the rear door popper circuit into the second output.

Keep searching until you find the thread (try "alarm wiring"). I am 99% sure someone posted the directions within in last 18 months.

I think the one limitation of this mod is this - if you "accidentally" unlock your doors, you would have to go and open and close one of them before pressing the fob button again, otherwise the next push would pop your rear hatch, not relock the doors.

Good luck!