It might be easier just to employ a alarms specialist to install an alarm into you car. It will cost about £200 fitted... There will be a key fob with locking facility, lights flash and leds added.
The Ford system would set u back a big amount i should expect without the fitting and thats if its compatible with the basic system you have atm. The ford alarm is useless anyways, never goes off, dont even thing it does go off.
Best to get an alarm done. My dad had a Toad alarm fitted to his Porsche and its brilliant!!!
This is my advise as FOrd alarms are BLOODY USELESS.
how this is helpful.