dose the new maps upgrade disk from Pioneer make my Z2 a Z3 and has anyone did this? if so has there been any problems to the 2 wire bypass and cdrom i have my Z2 complety bypassed and working great for over a year excpet for the lock ups when its realy warm or have my heat on in the winter my heater vents are located right above my Z2 witch sucks for when the heat is on but great when air is on to cool it off i need to do the new firmware update to fix that also. I am so scared of screwing up my bypassed system that i haven't did any updates not even the gracenote up dates is all this safe to