Change a head light because it's burned out? Then you don't remove the entire 'bucket', you remove the bulb from the backside, the 'headlight assembly' stays put.
If you need to remove the entire bucket then I'd suggest buying a repair book on the car since what seems like a minor job is usually very complicated if you don't know where all the mounting screws are. Damage the bucket and you will be out many hundreds of dollars. They are not cheap!