I'm sure this sort of thing has been posted before - but in case anyone is wondering, installing new door speakers in the S is super simple.
All tools needed - T25 TORX, T30 TORX, 10MM Socket, Screwdriver, and electric screwdriver with bendy extension (makes it a hell of a lot easier to install the speakers)
Take off the door by removing the 10mm bolt & 2x T30 screws - use the flathead screwdriver to get the rubber piece out of the handle and the plastic piece from the puller area:
Then pull the door straight off (do not twist) - using a bit of force and I recommend starting at the top side closest to the body of the car - it was easiest for me:
Once pulled off, balance (or have someone hold) the door for you, remove the 4 screws from the speaker with the T25 TORX, and detach the electrical connection by pulling firmly:
Screw in the new speaker, attach the electrical connection and put the door back together the opposite way you took it apart and TADA - you're done. I timed my final one - took me 8 minutes from start to finish to remove the door, install the speaker, and put the door back together. Super simple.