how do i fix my headlight?

i accidently hit another car by putting my car, a 1994 or 1995 nissan pathfinder in drive instead of reverse. now the front bumper is a little bent but not to bad, but the head light is smashed. the bulb to the headlight is fine, it's just the glass around the bulb. can u tell me how to repair my head light or how much it'll cost to get someone to do it for me? thanx!! P.S.-the car i hit was mine to so no need to worry bout that:)