CALL OF DUTY 4 (v1.4) SINGLE PLAYER CRACK [READ ME]

Replace the file 'iw3sp.exe' with the one currently installed (C:\Program Files\Activision\Call of Duty 4 - Modern Warfare\iw3sp.exe)

This crack will allow you to play Call of Duty 4: Single Player with no cd.

Update to 1.4 with the patch and then to 1.5.These patches Will allow you to play multiplayer on cracked servers. 
Try game-tracker.com to find some cracked servers.