Two cars-one remote

some companies allow you to program the second vehicle to the first transmitter (should say in instructions)and typicallywhen putting the first transmitter onto the second vehicle whereas you would say press the lock button when programming the transmitter on the first vehicle, when adding the same transmitter to the second vehicle you would pressthe trunk button.then when you wanted to use transmitter 1 on vehicle 2 you would first press the trunk button, then the command you wanted.I know this is true for most Autostart, Command Start, Prostart units.See programmin a new transmitter in the instruction book, most code learning transmitters are the sameJohnElectrotech Support Services

on the dei remote starts you can program as many things to a single remote as you want, depending on how many chanells it has. Say you have a 4 button 16 channell remote -- I II III IV. You could do I will lock car 1, II unlock car 1, III lock car 2, IV unlock car 2, I and II will start car 1, III and IV will start car 2. Then you could do say I and III for trunk release on car 1 and II and IV for car 2.