I have the 6.5 Boom Box system. Is there any way the navigation map can come up after hitting "accept" without going to the radio first? As soon as I hit "accept" the radio automatically comes on the screen. At this point I don't have much interest in the radio, but I like to keep the nav on the screen even when not navigating. I can then hit the nav button, but I'm just wondering if there's a way around it. Thanks.