Motorola Droid X :: Car Dock Nav NOT Standard Google Nav - Works Poorly

I got my DX almost two weeks ago, and immediately ordered the Motorola Car Dock. When you dock it, and it goes into car dock mode, it has a "My Location" button, which takes you to a google map with some overlayed buttons (some kind of skin, essentially). You can select "Nav" on that screen, but it does not take you to the Google Nav app, instead it opens up a dialog box, where you can enter your destination. Then it will work like Google Nav. It really stinks that if you return to the cardock home screen, to change your music or something, when you come back to the My Location> Nav, you will have to re-enter your destination.

Another huge frustration from the lack of integration with the Google Nav app, is when you use the standard Google Nav App (like set a destination, before you leave the house), and then get in the car and enter car dock mode, you can not access your current Nav through car dock mode. You can still get back to it, but you have to exit "car dock mode", and open the Google Nav App. Anyone have any solutions to this? If it were possible, the simplest thing would be to remove the "My Location" button and replace it with a shortcut to the Google Nav App. It does not appear that you can change any of the preset buttons. There is one button that you can set, but I have it set for Pandora, since I use it frequently.