Things You'll Need
Instructions
Download a large, gameplay altering mod from a website that hosts mods for "Company of Heroes." These mods typically change several of the models used in the game and a large amount of properties, such as adding a third faction to the game. Look for mods on file-hosting sites such as FileFront, FilePlanet and Strategy Informer. Mods are created by the game's community, and they are available completely for free. Once downloaded, the mod will be in a compressed folder.
Extract the files from the downloaded folder with the file extraction program of your choice, such as ExtractNow, WinRAR, or WinZip. To extract the files, right-click the folder, click "Extract..." or "Archive..." and choose a directory to extract the uncompressed folder to. Any directory will do for now.
Move the mod's files in the folder designated by the mod's file description (listed on the website you downloaded it from) or its "Read Me" document. Depending on what mod you downloaded, the mod will need to placed in a specific location. Mods, particularly large ones, include a "Read Me" document that detail exactly where to place each file. If your mod does not have a "Read Me" document, the installation locations will be listed on the website you downloaded the mod from.
Place the mod's .exe file in the main "Company of Heroes" directory. This location could vary, depending on where you to choose to install the game during the installation process. By default, it will install into your "Program Files" folder.
Double-click the modded launcher (.exe) to launch the game with your downloaded mod. Anytime you want to play the game with this mod, you will have to start the mod via the launcher that came with the mod files.