There are two ways to do this. One is to drill out the rivet. If you go that way, the whole thing will just come out. The other way is to pry it out. If you do this you don't need to replace the rivet. Does the kit you got come with the brackets? If it does, you may want to drill out the rivet. Remember, if you use this approach you will need the big rivet gun. It looks like a bolt cutter. If not, use the second method. I just checked out the kit. Are the actuators in the kit Ford products? If they are, that is a good deal. I didn't get the actuator yet. I originally took the door apart because the door handle snapped and I needed to replace it.
If you need instructions on how to pull the door panel, go to spark-plug.us. In the fix it area, there are good instructions. There are also instructions for doing this project.