I have a faulty GEM Module and have found some 2nd hand GEM modules from car breakers with 6 months warranty. My only question is Ford tell me a GEM module has to be programmed and it may no be possible to program a 2nd hand one, can anyone give me some advice regarding this, am I not able to swap in a 2nd hand one?, will the keyfobs work, if any programming is needed can I do it myself?