We are in Rome for a day. We are scheduled to tour with Rome in Limo. We want to see the Vatican/Sistine Chapel, but do not want to spend a great amount of time there in order to see other things. Is it possible to "breeze through" in order to see the Sistine Chapel and still have time for the Coliseum, Spanish Steps and other sites including the Catacombs/Appian Way. Not sure if we are trying to do too much. Please give opinions/suggestions. Thanks!