This .zip contains all that is necessary to use VESTIGIA. 
In it, there is the main mod, which is the "VESTIGIA" folder. Moving this over to your LML folder will run the mod with default settings.

Besides that there are optionals, which are explained below:

Precipitation:
There are two precipitation options, default and stylized. While default precipitation is more realistic, stylized precipitation will look more visible,
especially when using DLSS. (If you're using DLSS, I would strongly recommend stylized precipitation.)

Gameconfigs:
Gameconfigs manage limits and memory allocation in game. 
In Vestigia, the higher the ped-limit in a gameconfig, the more dense urban zones and some animal-heavy locations are.
The flip-side to this is that the higher the ped-limit in a game-config, the more chance of instability in more extensive modlists and very certain missions.
The default is a 150-ped-limit gameconfig, higher options are in the Alternate GameConfigs folder.
To replace one for the other, copy the game config in the Alternate folder into the global folder in Vestigia.

Nighttime Darkness:
Self-explanatory. Darker nights mean less visibility and harder nighttime missions. Note that some missions will not be affected by this setting. 

