Question about 5 wire door lock actuators

I was under the impression that if you turned the key in the door, then they would automatically unlock the rest.
But now I'm not sure.

Basically I'm wanting to fit central locking to a classic.
Its already got a good alarm fitted, which has the ability to control the locks, but I was going to add a modern touch with an inside 'Lock / Unlock' button using a latching change over relay.

Ideally I would like the drivers door to automatically unlock the passenger one if I use the key, although I guess its not critical.

Thanks, I do yes.

But currently all the car has is an alarm system, I'm still at the design stage for the locking!

2 wire actuators give no indication of the actuator position 5 wire actuators do via an internal micro switch) other than that they are the same If you buy a 4 door kit you normally get 2 x 2 wire (rear doors) and 2 x 5 wire (front doors) One reason is so they can be interfaced with the key of the door lock (cars without central locking don't normally have key switches) so if you unlock with the key, the actuator is moved and operates the micro switch, kits normally come with a control module that controls operation ( and provides the polarity reversal) and normally has the facility to connect to an alarm system.
I may have a manual for a Clifford 650, I'll have a look.

Wire up the inputs to activate the solenoid. The outputs go from the master solenoid (usually on the drivers door) to activate the rest when the key is used (hopefully that makes perfect sense)

OK, I think I've got it. 

The wording on the website is a bit confusing. 

So:
Green / Blue: Push pull to activate the solenoid. This in turn changes the other wires

Brown: Lock input: Connects to Ground when door is locked
White: Unlock Input: Connects to Ground when door is unlocked

Black: Ground wire so that the two above can be grounded. 

As the Lock / Unlock input wires will provide a constant connection to ground, I need something a bit more complicated then a direct connection with a relay. 
I found a wiring diagram for a Honda Civic lock control module that is easy to find, and pre canbus, so works stand alone.



In this case, the door lock is not motorised, it simply signals the module to unlock the other doors when the key is turned. 
But if I replace this lock switch with our 5 wire solenoid & wire it like below, then I think it will work:



In my case, I can remove two of the locks as I only have two doors. 
And when I actuate the drivers lock with the alarm, an internal switch or just turn the key, it should do the passenger side as well. 

Is it possible to install a keyless entry system to this type of central door locking system? If it is, can you at least give me a guide on wiring installation. It has 5 wires and I'm confused which is the lock/unlock trigger wires. By the way, this is attached to a Japanese model car Nissan Otti. Your help will be very much appreciated. Thanks.