If you need to replace the bulb, reach around to the back of the headlight and unscrew the socket. You'll probably have to move the battery to get to the turn signal/park lights on the passenger side. If you need to replace the whole headlight assembly (cracked lens, etc) then get a phillips screwdriver and start taking stuff apart. Remove the plastic cover that connects the grill to the radiator frame. Remove the screws at the top of the headlight, and from there, I can't remember exactly what comes apart next, but it isn't that difficult. I recall that it's mostly screws and a few pieces that clip together. Just get in there and have at it.
Also check the performance lighting section, faqs
