How do you change a headlight on a '92 Bonneville?

I am having trouble figuring out what I need to unscrew to get to the bulb.How do you change a headlight on a '92 Bonneville?You need to remove the grill if you what to remove the headlight but if all you what to do is replace the bulb then just un-tighten the plastic nut that holds the bulb in and in some case you will need to remove anything that is behind this so that you can reach it correctly.......