Step 1: (Start with the driver side) Peel off about 2 pins from the door weather strip to reveal the access hole. Then use a T-20 torx driver to release the screw that holes the IR receiver piece - WARNING: do NOT immediately remove the screwdriver as the screw may fall off!
Step 2: Use masking tape to hold the screwdriver in place, so that you can continue the process without worrying the screw falling off.
Step 3: Carefully pull out the IR sensor/lock assembly and unclip the sensor.
Step 4: Hold the screwdriver, and tape the tail of the screw to secure it. Now you can remove the screwdriver. Then slide the door handle out in the order shown.
Step 5: Slightly pry the 3 hooks of the cap to remove the the lock and IR sensor.
Step 6: IR sensor/lock cap removed.
Step 7: (Passanger side) Repeat the procedures to remove the IR sensor assembly and the handle piece. Remember to tape the tail of the fastening screw first before removing the screwdriver!
Step 8: There is no lock on the passanger side. Use a flat head screwdriver to pry off the spring holding the IR sensor to the cap.
Installation tips: Make a hook using a steel wire to pull the door latch (inside the door, brass color) out while putting the door handle back, it makes the job a lot easiler! And, use some blue loctite for the screws.