theres so many different threads kinda hard to track down the right one. but anyways, i have a z1 post july with a 2 wire mod. i also have cndv 1000hd disc on order. its on back order by the way. but when i do get it will it mess up my bypass? i also wanted to update my gracenote, will that also mess up my bypass. im confuse about disabling the security and stuff like that. all i know is everything is how it was out the box beside the 2 wire mods. thanks gurus.