Hello K-Phat,
The link below will give you a driveway workable method of adjusting your headlights:
http://www.autooptiks.com/aiming.html
I aimed the "Bubbacon" headlights using a similar procedure.
(This might have been the display of mechanical wizardry that truly convinced the neighbors of my insanity.) :wink:
BTW, although you didn't ask, foglight (not driving light) aiming procedure is almost identical, except that the upper edge of the fog light bright spot should be set at 4-inches (vice 2-inches for the headlights) below the horizontal at 25-feet.
Personal experience caveat: The above method, if done correctly, will get your headlights in the ball park, but I think it might be worth going to a garage and paying for a pro headlight alignment. A little off at 25-feet will be a LOT off at 150 to 300-feet.
You can do the trigonometry. I am having my post-lunch coffee and at the moment feel too lazy to spell "hypotenuse."
Regards,
Gadget