You can either download the zip file from this site or use one of the links from the Nexus mods website
Virustotal.com website report
The minimun system requirement is Windows Vista. Only Directx 9 games are supported, a Directx 11 version is on its way.
Any other software that changes the game's shaders or modifies the game's graphics pipeline will most probably interfere with this mod.
The latest version of the software is 3.4.0
Copy the contents of the zip file to the directory where the main game's executable file is located.