I have a couple questions that I hope you guys would answer for me.First off i have a 03 g35coupe with nav,and i saw on the 06 g35 that at night the display turns black and the sky turns to night,i think thats cool and also its alot better that the screen just dimmin out on the 03.So wat i want to know is has anyone purchased the upgrade disk 4 thier nav?,and does it do that on the upgraded software?If not can the 03 nav unit be changed out for the 06 unit without any problems?