To summarize I understand the problem and solution correctly:

Each Hardpoint (on ship models and weapon models each) have a range of movement. Players can use those freely (+ the muzzle cone tolerance degree given in constants.ini to "shoot around the corner").

NPCs do not use these ranges for guns and missiles. Only for turrets (else no station and cruiser would work).
Instead NPCs take the default direction vector of gun hardpoints + fixed 3° for guns or 22,5° for missiles.
Meaning that even if a gun could be rotated 360° they would only fire almost straight forward.

Is that correct?

And then the fix means now that NPCs, given a higher degree by Adoxa's hack, could also use the HP movement range freely (if using a big range set in the offset).

Ok, I just noticed myself that I misunderstood the problem. The NPCs do not use the player muzzle cone entry from constants.ini, but instead the fixed ones given by Adoxa. Allowing them to also shoot "around the corner", so to say.

Thanks for uploading those. I knew them only from a Youtube Video that had them all merged into one long soundtrack-video.

I also still have some other Freelancer Soundtrack on my PC. Certainly it contains tracks from yours, just cut into several single titles. But it also contains Bar Music, which is missing in your version. This Bar Music however is in better quality than FL's, and so it must be also from some "more original" source.

I think J.R. sent it to me once.
Download: Freelancer Soundtrack

And since we are at this, Syd once also sent me very early music of the game.
Download: music(early)

Oh, those are really nice models.

For such ambitious plans it would be nearly a waste to concentrate too much on current FL. It would require a lot of hooking and such.
Librelancer or something else might be much better suited since you have access to everything. And I mean not just interfaces.
But that would still need to be finalized. So until then, I know, there is only Freelancer.

Btw the link to the interface prototype you had in your post earlier was very nice.

Actually it is mostly my fault. Recently I am playing too many other games and am busy with university stuff. And since I'm pretty much responsible for the UI, I delay it by not being motivated at all to work on it.

If it really doesn't work, just list all models you need and I'll do it.

It works fine in multiplayer. On a default server there are no cheating issues or other problems. Money is calculated based on ship hull price. Repairs are working.
However there are two changes: All ship components now always have a repair price of 1, except for the root ship component, which has the correct pricing. I guess it is because ship components don't have a price at all via goods.ini?
And second all ship components are now displayed as "Ship Component" instead of their individual name.

The latter isn't a serious problem, but the first one might be: If you don't repair the main hull and only single components it comes nearly for free.

Is there any way to rotate camera in the system view? I just see controls to move around.
And unfortunately when clicking on Gameplay Demo, the music of Liberty starts, but the game is stuck in a loop. No errors, only "no sur found" warnings.

Edit: When moving around in LI01 the game also gets stuck when approaching Fort Bush or getting Manhatten in my view.