The first step in replacing the shower was to demolish the old one. This proved to be pretty simple as it was just a flexible surround that was held to the wall with a few screws. After removing the screws I simply rolled it up and threw it in the back of the truck. The next step was to remove all the drywall that was behind it. Again, this was an easy job. I scored it with a box knife where I wanted to end and then knocked the rest of it in with a hammer. I picked it all up and moved it out of the room.
The previous shower pan was not an easy task as it was glued with construction adhesive to the plywood subfloor. It was in bad shape so I decided to break it out of there too. Using my pry bar and a hammer I slowly began tearing it away from the plywood. Most of the top ply came with it so I knew I would need to replace the subfloor in that area.
The last step was to take out the ceiling. This is a job that may or may not need to be done in your bathroom. I decided that I wanted to put in an exhaust fan/light combo so I needed some space to work. I took it out just like the drywall, by scoring, cutting, and then pounding it out with a hammer. Here is a picture of the finishied demo work along with the old plumbing.