hello boys its me again and i take no offence as some fitters that work for garages just fit parts i have trained for a few years now and think im pretty good at what i do so no offence taken.this is what i know about p38 keys, i do know that all the information is held on a huge ford data base now,this hold your chassis no reg no engine no gearbox no and so on,also they know how many keys have been issued to that vehicle and what no they are stated on back,the becm holds all the information regarding key nos eka codes and basically everything you need to know,the engine ecm also receives a code when the key is inserted into ignition,i would only buy a key from landrover as i trust them and they have the knowledge you can only get a full lock set with matching keys from landrover i believe,to synchronise the remotes you only have to turn key to the unlock position and press unlock on handset then turn to lock and press lock on handset this is only to synchronise the remote after replacing batteries or such like you can use the EKA system but that only mobilises the car that time and you will have to do it every time to get car started,im sure some body can get the keys to work with computors,but as far as iknow you cant extract the security coding from the BECM other wise people would just be able to steel your car if they got the info,so be carefull they keys have a fixed code and a rolling code and thats why i would recomend paying the extra and have no hassle hope this helps.