Still not explicit enough >: How about

    Copy the "wind_config" folder into [SteamInstallDir]\steamapps\common\team fortress 2\tf\custom (such that [SteamInstallDir]\steamapps\common\team fortress 2\tf\custom\wind_config is created), where [SteamInstallDir] is.

Also please keep it to 100 columns like the rest of the file.