I wanted to listen to it and cannot find it in my downloaded version. I do have the Sistine Chapel - am I missing something?
Its very difficult for anyone to do an audio guide of the Vatican Museums as they change the path through them very often, sometimes within the same day. The audio guides you can rent there are number oriented, see the number on/near the item you are looking at, punch it in and hear the text. The two trips we've taken through the museums were very different as far as the path that was taken.
We found Rick's audio guides of the Sistine Chapel and the Basilica to be entertaining.