2006 4 Runner

I have a quick question and I am sure it has been asked before so I apologize in advance. My personal physician has a 2006 4 runner ( I own a 2006 Matrix XRS ) and he was wondering if there was a way to disable the feature where when he puts his 4 Runner into park that all the doors won't unlock. Reason being is sometimes when he is in certain areas he would feel safer if the doors didn't automatically unlock the moment he puts the vehicle into "park"...any help with his problem would be greatly appreciated!!! Thanks again so much!!!