Quick answer is No, you can't Guests cannot see images in the messages. Please register to forum by clicking here to see images.
Not manually anyway. Makes sense I know!
The way to do it is this:
Don't maually lock the car doors.
When leaving the car close all the doors.
Open one of the rear doors and lean in and press the button on the centre console to lock all the doors and boot.
Close the rear door. This doesn't work if the front doors are open, it'll just trip the system and unlock again, has to be done through the back door.
To get back in the car just unlock the passenger door via the emergency key.
Hope this helps.