i recently installed an alarm in my car and today i went to open my car, so i disarm the aftermarket alarm and once i open the door the factory alarm went off which caused the horn to honk. so i had to get the old factory remote and disable it. how do i disable the factory alarm? i know if i can find the brain for the factory unit i can put it on manual instead of auto so it wont automatically arm when i lock the car. i tried looking for the brain but i cant find it anywhere. anyone know where the brain might be for the stock alarms?

sorry for the long entry.

cliff notes: where the heck is the brain for the factory alarm????!?