If you are looking for this file because you are trying to play the mod, remember that the project was officially shut down following a cease-and-desist from Activision. Most legitimate community guides now recommend only using files sourced from a legal Steam installation to ensure your system stays secure.
Steam will scan your folder, realize iw4sp.exe is missing, and download a clean, official copy automatically. "iw4sp.exe is Missing" - Common Fixes
Never download .exe files from third-party sites. If your game is broken, use the Steam Verify tool to restore your files safely and legally.
