[Alneyan]

- The atmosphere will adapt to the species with the most members, but the planet would be domed then. If you are using Atmosphere Converters, you should have only one species on the planet.

- I think the Atmosphere Converter will convert the atmosphere every turn after the atmosphere delay, so you could change your atmospheres by changing the leading species on the planet. I have only read that however, as I do not see why you would want to do that.

- Neoshipsets are only used by certain mods, such as the Highliner mod, and perhaps Proportions (among others). Mods using Neoshipsets add hulls to the Vehiclesize.txt file, and the images from the Neoshipsets are used. You could use an image from the Neoshipset for a regular hull though, but I am not sure you would like to do that.

You could change a mod in the course of the game, but you would have to put all your additions at the bottom of the appropriate file. Changes to already existing components/facilities... can be done, but they will not necessarily affect already built components/facilities... (A lower construction rate will affect already existing spaceyards, but increasing the cost of spaceyards will not affect the spaceyards you have already built)