I hadn't noticed this until your posting as our unit just got installed Friday. Not sure it's an issue for us but we'll see.
We have basically the same Nav software in our '06 Lexus and ran across a posting in Club Lexus forum shortly after we bought the car for an override built into the screen. As weird as it sounds it was probably built in for the maintenance folk. You'd go to the volume screen and touch the upper left corner, bottom left corner, upper left corner again and bottom left corner again (no buttons, just blank screen). This would then bring up a handful of maintence only buttons but one of them was labeled 'Override'. This would then open up all functions that get locked at speed.
Like I said, weird but worked. Used it a few times when moving so my wife as passenger could have full access to the Nav functions. Maybe there's something similar in the SNS200.
We have basically the same Nav software in our '06 Lexus and ran across a posting in Club Lexus forum shortly after we bought the car for an override built into the screen. As weird as it sounds it was probably built in for the maintenance folk. You'd go to the volume screen and touch the upper left corner, bottom left corner, upper left corner again and bottom left corner again (no buttons, just blank screen). This would then bring up a handful of maintence only buttons but one of them was labeled 'Override'. This would then open up all functions that get locked at speed.
Like I said, weird but worked. Used it a few times when moving so my wife as passenger could have full access to the Nav functions. Maybe there's something similar in the SNS200.