NO NO NO NO NO NO NO. NO NO NO. Do not do this. No installer in their right mind will touch the car when (not if, WHEN) you fuck it up trying to swap an alarm yourself. I hate getting people in my install bay that think they could "do it themselves." I delight in charging them tons extra for all the added aggravation that they cause. Today I had somebody who said he could install a radio cut the wiring harness with scissors and short out his body control module.