Why isn't SolarSys3000.pak working for me? I put it directly into the addons folder.
Go into the addons folder, create another folder called "catalogs" (without the quotation marks, of course)
then create two more folders inside of "catalogs" called "planets" and "stars".
Open SolarSys3000.pak in a program such as 7Zip.
Go into SolarSys3000's version of catalogs/stars and addons/catalogs/planets.
Now put SolarSyst.sc in SpaceEngine's catalogs/planets folder, then Solar.sc in addons/catalogs/stars
Hope this helps.
By the way, the textures for SolSys3000 are now procedurally generated, when will this be fixed?