If you have a mod enabler, the "Naval Fulcrum Mod v1.5" folder is already set up to work with it. Just paste the folder in your mod folder.
If you do not have a mod enabler, copy the folders inside of the "Naval Fulcrum Mod v1.5" folder and paste them into your DCS directory.
Paste the "Mods" folder from inside the "Saved Games" folder into your saved games DCS directory. If you do not know where this is, it is
usually located at "C:\Users\YOURUSERNAME\Saved Games\DCS.openbeta". This mod passes the IC, enjoy!