Update: I had to reprogram the key but holy crap my fob works again! After half hour charging at 20-30mA the battery read 3.2 right after removing from the charger. I'll measure after a long drive and overnight to see how it holds. (so you can have a reference voltage).
What music to my ears to hear the door locks clunk after not working for four months! I didn't want to risk damaging my only key and planned to open this one up only after I buy my replacement.
Since my fob works again I can now verify the procedure to open double locked doors.
http://www.youtube.com/watch?v=1sHCqodyipI
Funny I forgot I would set off the alarm when I opened the door. Captured real time on the video.
You may set off the alarm mid way through lock smith entry but I think the motion sensors are thermal so hopeful the small rods used to push the central lock button and pull the door handle won't register and you won't set off the alarm until you open the door.
Ok: it just got much easier!
With the central lock pressed it activated the trunk release. As odd as it seems it should be easier to press the two buttons and jump in the trunk than pull the door handle although you could have an "L" shape rod to twist to push the door handle. I think you only need to do it once to unlock then pull from outside to open.