There are backup options even for dead battery. I have made all of this, except removing ignition key...
obiesro: croatian: Daj pitaj mene prije nego se upu?ta? u elektroničke akcije na autu. Ja sam ekpert za to... I moramo se naći da vidi? ?ta se radi i kako...
back to english: Well, he is my fallow croatian, so I told him to come to see my car, because we live in same town...
Shaved doors and stuff is possible to do, but you have to have aftermarket car alarm system that is more then that... I made myself car alarm system "SMS COMMANDER" witch is more then car alarm, it controlls nearly everything in car, and all is over SMS (short message service) over GSM...
I can controll engine on and off, stereo, windows, doors, alarm, it sends SMS with location and status when someone thouches your car, and many more options like shift light, clima managment, etc...