Well, I'm working on a tutorial for adding turrets to ships at the mo' , pretty much as i learn it myself. It's not exactly a capship tutorial, but it should be useful once it's finished (early next month, after my exams).
The earliest parts of the tutorial (TBC) is on the web at uk.geocities.com/aldo_futbol/tutorial/tutorial_1.htm , although it isn't finished yet by any means.
At the moment it covers creating the ship with turrets in TS1, and nameing the sub-objects, but I've yet to double-check it, so I won't be held responsible for any £$%^ ups caused by bad info there (at leats not yet).