my best way, just because I don't know everything and would do this way, is to go down to autozone and find a 2003 book that had the cover off and read up on changing the headlight assy. Memorize it and go change it. Some autozones might even let you make a copy of the page. I've even asked them to take the plastic cover off so I could read a certain page. Use autozone or other carparts places as a library.