Thanks very much for your detailed reply. I just tried your suggestion (i.e. clicking the boot button on the remote with the ignition on) and sure enough, it shows "2 transponders. 2 remotes" on the SID display. However, the remote does not actually work; when I try to lock or unlock the doors or open the boot with the remote, it doesn't respond. The remote has a fresh battery as well. Odd, yeah?