iwd after you extracted the xmodel folder if you changed it or else the game will not load all of it's files. Depending on what unzipping utility you use, you may need to rename the extension to. IWD files are the same as a zip file, so you should be able to open them using any unzipping utility. Extracting this folder allows you to browse for models instead of having to type in a name. You can place models in Radiant without doing this but you would have to manually type in the model name. Radiant users must extract the xmodel folder from iw_13.iwd for radiant to show the list of models. Please contact your hardware manufacturer to find the latest drivers for your system. Please note that CoD2 Mod Tools requires your video drivers and DirectX to be up to date.
