Automatic Door Locking

I recently brought a Range Rover L322 (2003 4.4 Vogue) and i read in the book that you can programme the doors to lock automatically when the speed is greater than 10mph.

As i have mad kids this could be handy but in the Owners Manual is states that a LR Dealer has to do this.

My question is, does a dealer have to do this or can I??

Thanks in advance

sounds like yer could do with doors that automatically open ter throw em out

Or a book on parental skills.

You just need to press the ejectshun seat button twice and your problem should be solved.

P.s.
Make sure sunroof is in open position before firing