I am trying to adjust my headlight on my wifes 02 monte but i can onlt find one adjustment screw.

 

Thats the adjustment screw for it.. Stock ones only have up/down, some aftermarket ones have left/right also.. One of mine has been replaced and it has left/right adjustment..

I remember way back searching for the left/right adjustment myself..

 

If it seems like the adjustment is completely wrong and the screw doesn't help, make sure the bulb is seated correctly. Sometimes they don't get pushed in right away and then turned and they sit a little crooked.