I am somewhat a newbie to this type of thing, but I have a 2005 BMW 645ci, I live in the USA .... is it ok to install this v32 of the Nav firmware on my car, or is there a different version that I should be upgrading to ??? mine is the one with the DVD in the dash, under the CD player, with the screen located in the center of the dash at the top, and the "joystick" down near the shifter... Thanks for any help you can be, just dont want to mess up my car...