ok how had is it to add it to my car and is it easy to set it up to my central locking or what?

u can get plug in piggy back controllers, well not exactly plug in, but plug in to an extent, then they plug into an alarm then the alarm gets hookd into various sensors, and wullah, its not too hard to do urself, just get a good quality unit like stinger, other wise ur gonna be fukin around with s**t for the rest of the alarms life, by that i mean before u tear it out in anger