XWA Upgrade

I need to add a complete New Slot in XWA (I have XWA steam installed with XWAUPG 3.0) WIndows 10 (I need to add Eclipse -ESSD and more)
AS i found that I cant use Dont use me slot.
There are 220 slots can I add 221. Which adds entry in to all files shiplist flightmodels etc.
Pls guide me in details.

There are a whole bunch of empty slots inbetween the vanilla craft, which you can use, for example:
- 33-42, 49
- 66-70
- 86-90
- 116-125
- 184-191.
Unless you already have an old craft pack installed which fills those already, you can use those. If you have a craft pack installed, you'd have to choose a craft you don't need and overwrite it.

I don't think there's any way right now to add additional slots (@JeremyaFr ?).
However what you can do is use the mission Objects hook to replace a speciffic ship (e.g. regular SSD) with the Eclipse.

Moving this to editing forum.

Also please don't post topics TWICE in different forums.

Thank You Vince for your prompt and very helpful reply. I will try the above.

Afaik adding slots to XWA would imply greatly changing the code...

Still the question remains, is it feasible? mission objects and profiles helps for sure. Editing the Craft ID would help towards replacing crafts with different ones.

Probably not, the problem is the strings.txt file sort of represents the craft/objects slots in the .exe which is limited to about 220.

Another problem is that the game engine uses 8-bit values for craft type. This can't be changed. Increasing the above limit that Bman has posted will be limited to 255 or 256. This would require a lot of work. There would be a lot of breaking changes such as game files structure, tools, patches. So it is not possible to break the crafs slots limit.
The best way to have more crafts is to use multiple installs of the game.