Since I have installed 2.0 Beta 11. My dimmer is now 100% functional! I DON'T KNOW IF IT WAS JUST BECAUSE I INSTALLED BETA 11 OR IF IT WAS BECAUSE OF THE STEPS I FOLLOWED. For those interested, here is what I did.

1. Installed 2.0 beta 11.
2. Installed Hi-Jack beta 11 release with Tony Fabris logo edit software (very very cool).
3. Used hijack kernal to "force dc power mode upon reboot".
4. Went into dimmer setting while connected to AC power, and reset dimmer to 100%.
5. Used hijack-kernal to return boot select to auto (not force dc power up).
6. Installed player back into my truck.
7. No more problems with the Dimmer setting at all!!! I would go as far as saying, this is the best my display has ever looked!