I have an SEL and I believe that the trim plates are the same and it is very easy to remove. Just pull gently and evenly on the bottom edge of it and it will pop out. It is just held in there with compression tabs and they are easy to remove and put back on. The radio itself is just held in with 4 (12mm I think) screws and there you go.
Had mine out over the weekend to see how much room I had behind and around the radio, pretty easy task.