[oxygenes]

i explored mod New civil war (StarRover) too, here author included besides others model Nova-battleship, but just little part of model (3kB imd), the big part (650 kB is missing).
Observing mechanism of model (small part is invissible) i got some ideas for rocket turret.

using common (THC1) as carrier for rocket modul.

burst is set to 0
range is set ala rocket

barrel´s imd can be hidden or replaced with rocket launcher imd, just optical effect, turret is still able firing shells

into barrel/rocket imd will be insert point for rocket modul, this way rocket modul will follow movement of turret´s gun barrel.

Real problem starts, when we want control it from user menu, because engine consider it like pure gun tower. How to "tell" to turret´s gun barrel, that there it has allowed rocket modul too.
Unfortunately, i am not good scripter, so content of the next lines is behind my practical knowledges.

Within mothership menu could by created extra window/frame (like kind of next fighter), where will be insert icon of rocket turret and this will activate extra window for rocket modul of rocket turret too.
it could probably demand changes in files .xsd (directory XMLSchema) and others too.

you buy rocket turret, place it and rockets will be reloaded through new window as usualy
or may be buy full and sell empty rocket turret, if reload will not work.
or icon of empty rocket tower will be deleted by script

if it will be impossible, there is still possibility create load/unload functions by script. I was read on StarRover forum, there boys plans run mod Retrospection on engine of sw2-ciwil war. There was comment, they have functional script for teleportation particular modules from mothership into fighter via script and hot key.
Similar way could be probably solved reloading of rocket modul conected into gun turret.
i know, it is just theory, but may be someone more experienced can confirm or refuse this idea.