Thanks Jahos,
Been piddling around with a cheesy fix to use the Sirens Bane ship in freeport. Got lots to do yet. Not sure what others were doing, but I'm simply using 6 of those launcher boats (race 73), spawned in formation to form the solid deck for the ship. Getting them to path in formation will be the easy part.
The distancing and height of them was the most tedious. That "best-z" thing wouldn't let me keep a decimal value to put the surface of the launcher floor just under the deck of the ship, so (as you see by the pic below), the new look will have to suffice. Otherwise, the toon sunk a bit into the ship deck, haha.
If I get this ship up and passenger worthy, I'll put together a query, etc and post it, for anyone interested in it.