I have it on good authority that this applies to some of the higher spec phase I's.
It certainly applies to my November 2002 Initiale.
All of the electrical wizardry including the door sensors is factory fitted to this car, the computer has been de-programmed to prevent the key-less entry functioning at the factory and the car would only have been supplied with 2-button keycards.
Reason : UK insurance companies told Renault they wouldn't insure it !! : Fact !!
Soooooo, who knows someone with access to a Renault Dealer diagnostic computer ?