Installing mods from .zip files
To install the mod, you will have to create a folder for World in Conflict in your public documents plus subfolders called "mods" and in there one with the *modname*. The total path should be: "C:\Users\Public\Documents\World in Conflict\Mods\*modname*"
Extract all files from the .zip pack and move them into the *modname* folder (or if there is a *modname* folder in your .zip pack, just into the mods folder). Example: Assume you want to install Fun Mod 1.5.4, the .zip file you download will contain the following structure and files: folder: "Fun Mod MW 1.5.4" files inside that folder: "Fun Mod MW 1.5.4.SDF", "modinfo.ice" and "modinfo.loc" (plus a change log .txt file which can be ignored). You can easily extract the whole .zip pack into "C:\Users\Public\Documents\World in Conflict\Mods", as you will get the folder "Fun Mod MW 1.5.4" automatically. NOTE: The folder containing the mod's .sdf file must have the same name as the .sdf file. Otherwise you will not be able to see the mod inside your game.

https://www.massgate.org/mods.php