INSTALL INSTRUCTIONS:

1. Go to game folder

2. Find the Paks folder (if the game was downloaded through steam the route will be something like 
C:\Program Files\Steam\steamapps\common\ECHO\Echo\Content\Paks)

3. Paste one of the .pak files there (whichever you wanna use), DO NOT touch the Echo-WindowsNoEditor.pak file already sitting there.

4. Enjoy.