Well that worked a treat, just followed the instructions from the manual & now have a functioning key fob ...
For those interested - you'll need to do the following after replacing battery in Key Fob :
To enter the programming mode :
1. Press “unlock” button to disarm the security system.
(If your vehicle is equipped with the optional security
system.)
2. Open the driver’s door and sit in the driver’s seat.
3. Close the driver’s door. ( make sure all doors are shut )
4. Place the ignition key into the ignition switch and
cycle the switch from LOCK to ON
Ten times within
15
seconds. Be sure to stop at the LOCK position. The
horn will sound once to indicate that you are in the
transmitter programming mode.
NOTE: You must finish the next step ( opening the driver’s
door) within
45 seconds of starting this procedure,
To program the transmitters :
1. Open the driver’s door.
2. Close the driver’s door.
3. Press and release any button on the transmitter
that you wish to program into the system. The horn will
sound twice to indicate that the transmitter has been
programmed.
Any additional transmitters can also be programmed
at this time. Repeat steps 1 through 3 for an additional
transmitter.
To exit the programming mode:
1. After all of your transmitters are programmed, remove
the key from the ignition switch.
The horn will sound three times to indicate that the
system has exited the programming mode.
2. Make sure that the keyless entry system properly
operates by operating each transmitter.
There were a few more notes / diagrams on 'how to' in the actual manual, but you get he gist of it.
Just needs a song line to go along with the movements ...
Cheers, Bantum ...