BJH1,
Here are some pics that I posted awhile back. They may be of some help to you during your install. Pretty simple and straight forward actually. Test the lights for function before you put everything back together. Regarding aiming the lights, the levelers are just a guide to get you in the general vicinity (like boresighting a rifle scope). The final adjustment should be done against a flat wall using markings like Ron did above. Take your time and enjoy.
Oh, one more thing...
DO NOT TOUCH THE GLASS BULBS WITH YOUR FINGERS. The oils from your fingers can ruin the bulb when it heats up.