Is it possible to have the doors lock automatically when the car is put into D or once it starts moving? Thanks

Yup. Go to the tech forum & search. You can do that mod + keyfob windows up + sunroof + vdc default off + ???

Found it: kptechnologies.com

Let us know how it goes. I'm interested for my G & my wife's Murano.

Thanks! Was hoping the dealer could program it for me

As per shredX it's is only possible with a 3rd party mod.

It is not possible as is.

The price is good for the door unlock mod, my only question is - how hard is it to install these, and are they hidden from view?

Well I just downloaded the installation manual for the door lock/unlock, and all I have to say is.....wha? No pictures? No way would I be able to do this.