I got my IM5 on Thursday and have worked out a 'get-around' for the pet issue - not ideal, but it works...
Whilst sitting in the car, put the drivers window down and open the scenes page on the centre console. Get out of the car, reach in and press nap mode. The window will put itself up (so be quick with the press) and the door handles retract. You can't open the doors without the key/card and the boot won't open either. Technically the car is still on (and the AC is on, which is kind of pet mode!) and I assume none of the alarm system is active, maybe even the doros aren't actually locked, but you can't release the door handles without the key card.