To install the Mod for "Sara" you have to:
==========================================

1. Install the base game first

2. download and extract the Mod archive in a temporary folder

3. move the extracted files into your game folder (...\game\)


That´s it.



There should be now a Mod button in the games quick menu
and also another one in the game settings/preferences

You also can activate the Mod menu while playing a game 
when pressing "Shift" +"k" on PC's.



Yours
KoGa3