The contents of the "ModFiles" archive needs to be extracted into the game's main folder. Example: "D:\Games\Sins of a Solar Empire".
You will first need to make a backup copy of the "GameInfo" folder because the mod will replace all the files located within.


The contents of the "Custom Map" archive needs to be extracted at "C:\Users\'YourName'\Documents\My Games" (for win10; win 8.1 should be the same).
These files only replace older versions of my custom map so backing up that folder is not required.