Hi all: Recently I read an article about adjusting onboard computer codes to perform routine tasks automatically. An example, one can automatically engage the central lock system when the speed exceeds 20mph, or, the headlights turn off when the key is pulled out of the ignition( I know this is present in late models, mine is a 95 LX and does not have it). My question is, is there a manual or any literature that explains how this is done and what equipment one needs to go about this. Any comment is welcome. Ben