Thought this may be of use to someone. You'll need an alarm with channel linking and assignable channels. I used a DEI unit, not sure if other brands have the same capability. Anyway I traced down the memory seat wires, and hooked it up to an aux channel of my keyless/remote start. Linked that channel to the disarm/unlock, and hooked up dome supervision to the door trigger. Now upon disarming/unlocking the memory function works with the aftermarket keyless/rs/alarm.

Memory driver #1
: light blue

Memory driver #2
:blue/yellow

Both are negative trigger and be tagged at one of two multi-pin harnesses coming in from the drivers door. Had to take the switch apart to trace them, but works like a charm

Chris