I'm not in front of a JX right now, but I'll do my best from memory. You need to get into the section of Settings that is called "Rear Display". I believe it is in Settings->Others, or maybe just Settings->Rear Display. When you get into the menu, there are a pair of "buttons" at the top to turn off the rear displays. Click these so they aren't highlighted any more and the rear displays will stay off. However, you'll see that they are still set to automatically turn on if a source (aka DVD) is inserted. This way they'll come on automatically if you put in a DVD, but otherwise stay off. If they're off, kids will be less likely to bug you to put in a DVD. I'll try to remember to double check this when I get to work and can sit in a JX.
WOW Congratulations.!! what a great SUV... I like the color of the you drive. Specially the interior color, its looking awesome. Because you keep it clean.. and you also took awesome shots, I guess you are pretty expert in photography. Good sharing