Hmm, it depends on what it is, what platform are you trying to use? GOG or Steam? If its GOG then what you have to do is set the Mod Path to Imperial_Civil_War because thats what the main mod path is going for so just replace the original folder and put the Imperial_Civil_War folder in the Mods folder and put the original mod folder in the Imperial_Civil_War folder and when you launch the mod using either the .bat file or a Mod Launcher, it should work! (Also look for folders with empty content and put those in a separate folder. I label the folder Differentials but you can label it anything, this works for many different mods. Good Luck!)