I found a guy who takes your 6.1 or 7.1 Nav disk and provides you with a backup which has the screen to disable the speed lock-out when using the GPS. I put a 7.1 in mine and boy is it great being able to use the GPS while driving down the freeway thinking of going to Starbucks and locating the next using the GPS locator while in motion. He can be located at cruisin@live.com if anybody is interested. I should mentioned it is available for most Toyota and Lexus models 06 to 08.