Nissan Primera P12 spare key programing?

Having spent a couple of hours looking for my keys this weekend (which i found) i have decided i ought to invest in a spare key.

I've bought a key from ebay thats the same frequency as mine so i can reprogam the central locking part.

But i've just spoken to my local Nissan dealer about getting a blade cut and having the chip reprogrammed so it will also start the car. After questioning me about which key it was (the squaree one with 2 buttons with white symbols on them-non NATS) he tells me that there isn't a chip that needs reprogramming. That i will be able to get a blade cut, fit it to the fob and the key will start the car. Surely this isn't right?

I made sure that he didn't have the wrong end of the stick and he confirmed again that all i needed to do was have a blade cut, i could fit it to any fob of the same type and it would start the car.

If someone could confirm that would be great.

Cheers

IIRC, al P12s have NATS (Nissan Anti Theft System),, which is basically an immobiliser system, and some have an optional Theft System, with alarm and such. Higher specced cars have the Theft system standard, I believe.
Looking at the BL section of the electronic service manual, from page 151 onward, there is talk about registering the key ID.
The square key has a small logic board inside, with a unique identifier, that has to be registered in the smart entrance unit. So no separate chip in the key that needs programming, the smart entrance unit just needs to be told that the new key is allowed to start the car.
The procedure is on the forum somewhere. You need all keys for the procedure, as sometimes they loose the registration of the old keys.

Ah, you mean the bit in the red circle?

Have the same issue, in that the car came with only one key, bought two more off well known selling Site, and now need to get them paired to the car. 

That is the transponder circled in the picture above.Every single one has a unique code built in.When you insert the key into the ign it is powered by induction from the coil at the ign barrel.The immobilizer and engine management units have to be programmed to identify these chips up to a max of 4.This has to be done by Dealer using  Consult 2.      Refer to pages BL-172-173