Here's my problem: I have kids and an 08 Scion xB

When you lock the door using the key with any doors open a loud beep sounds until you either press unlock or shut the doors. I would like to open my kids doors, press lock and get the keys out of my hands, unbuckle them, shut the doors and have them lock when shut (as with my 2 previous cars).

The situation is: My hands are always full and I have to keep the key in one hand wrangling 2 kids and whatever else I'm carrying in the other hand until all doors are closed before pressing the lock button and then attempting to get my key into my purse, so that I can use 2 hands. I would like to lock the car, while still getting everything out so that when I shut the doors I can walk away (locked).

Dealer tells me this is for Safety and can't be changed. Honestly, the way I have to do it now with two children and one hand in the middle of a busy parking lot endangers our safety a whole lot more. ANY HELP??