Unfortunately, I don't have install pics on the mirror, but it was really easy.
I work as a tech at a Toyota dealership, so I'm used to putting them in though. Basically, you run switched power and ground to the mirror, as well as the 2 wires for the temperature sender. I ran mine up the drivers side A pillar and across the headliner trim on the top. The mirror went on the stock Ford "shoe" on the glass, but I had to shim the setscrew with a dime. It sounds funny, but a penny is too large in diameter, and a dime is PERFECT. Hey, it's only a dime... Anyway you need the thickness of the dime to make the setscrew tighten the mirror on the shoe properly.
The temp sender was mounted on the radiator support in the grille area, just like it would go in a Tundra. I had to extend the wires a little, which made me worry that it would throw the temp reading off, but it doesn't seem to matter any. I ran the wires through the firewall at the same location as my boost and EGT gauge wiring.
The compass is dead accurate, as long as you calibrate it properly and set it up for the "zone" of the country where you live. You have to drive in a circle one way and then the other to calibrate it, but thats it. The thermometer is also pretty accurate, but is affected by warm temps in the grille area when idling at stoplights, etc. I compared the thermometer to my fancy digital thermometer at home, and it was within 2 degrees. It'll even display a warning if the ambient temp is below freezing, to alert you to possible black ice on the road...
The mirror kit was/is available as an accessory for 2002-2004 Tundras, and you might be able to find a "universal" application elsewhere.
Ryan