That is an idea Rondo, thanks for the input. I would have to build the interface or purchase the Resler interface and neither is an option for me. Besides, changing the startup screen is as far as I'm willing to go when playing around with the software without the GT1, which BMW uses, or an Autologic system. Other than the navigation, I was hoping to change the other settings programmed into the car's system. I am asking for info because I was wondering if it's a worthwhile investment to purchase the GT1 and which version? I intend to keep my BMWs