anya25- If you have not done so already, tt wouldn't hurt for you to read the sticky topic at the top of this section train travel in Italy. It is really comprehensive and its good to know how it works before you go. Once you read that you won't have any problems getting around using the trains.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007