Went through the files and did some tests and I can't seem to figure out what defines for the engine that the weapons should follow the cursor.
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Attempting to use the BC-304 mod from the Nexus, that adds said ship from Stargate. Love the ships appearance, however it simply sits and stares at any cap ship I've ordered it to attack, letting itself be bombarded. Doesn't even fire it's main guns, the Asgard Plasma Beams. I believe this is due the shape of the ship and layout of the guns. Seeing as in the show the Beams would often be fired at an angle, rather then straight ahead as L weapons in X4 are, I hoped that by making the weapons gimbaled it would solve the problems.