I just replaced all of my lights with Silverstars and couldn't be more happy. They are a huge improvement. The adjustment screw for the headlights are on the top the of headlights towards the outside edge of each light. Use a philips screw driver to adjust them.
It is tough to adhere. With work you can get it to stick. Another possibility is taking a black viny lsticker strip and cover that part, and then tint the rest of the window.