I am looking in my Thomas Cook European Rail Timetable (Winter 2009) and it looks like the train from Rome stops at Napoli Centrali. The table for trains from Naples to Sorrento leave from Napoli Porta Nolana and stop at Napoli Piazza Garibaldi a few minutes later. No mention of Napoli Cnetrali.
Do the trains from Rome also stop at any of the latter two train stations in Naples, or is there train connection between Centrali and Porta Nolana I need to know about and take.