Well, after finding out that the mirror I got only has the compass feature and not the temperature feature also (hence, that's why I didn't get the sensor...duh! :p ) I went and installed it.
It was amazingly easy, I already had a power and a ground running up my windshield header for my radar detector, so I tapped into those wires. After calibrating the compass, it's all done! I have to say, for 5 minutes worth of work, I love it! Now I know why you guys with the console love the compass feature, it is handy! (especially with all these crazy roads on Long Island!)
Keep an eye out on Ebay for these mirrors and/or the consoles, you'd be surprised at all the junk you can get for these cars. (and not all the stuff you get has to be specifically for the Intrepid either, so search for Concorde, LHS and 300M also!)