overhead console

i am tricking out my xj,(installing an overhead console from a grand cherokee) i know i can get the compass, and temp to work. but what about the other features, mpg, trip etc... anybody know if my xj computer is capable of calculating this info?

lol, good luck. better off getting a GPS

thanks, but
mine is a 2dr, so i need to maximize all my space. i take my wife and two dogs with me on trips etc etc. So i want one just to hold sunglasses even, and the extra lighting. If anyone has any suggestions or comments. please help!!