Recovry 4X4, that will be a pretty straight forward repair. If the mount is strong enough to support the fender while working leave it on. Start pulling the deformed section that is level with the kick up of the deck/support (photo0001) up while hammering in on the elbow that has formed on the lower lip of the fender. This will take some muscle and a fairly sustantial hammer. It will also take a little while to reduce the elbow. This should help get the basic shape back into the fender. Next remove the fender and use a hammer and dolly to finish the shaping/smoothing. I think you may run into 2 potential problems. #1 the area at the elbow will stretch, #2 the area may crack. Both are very east to repair. Once you have shaped it as much as possible, if the area is stretched you can shrink it by heating a quarter size area to red hot and then quench it with a wet rag. This may take a few attempts, so start at the center and work outwards. If the area should crack drill a 1/8 inch hole where the crack stops and then weld the crack. If you have any questions or if I can help in anyother way PM me.