Call of Duty: Modern Warfare Key Generator !
With those UNIQUE keys you can play on cracked servers for COD: MW
You can find the list for cracked servers here:
http://www.private-servers.info/call-of-duty-4
OR
http://www.gametracker.com/search/cod4/?query=cracked
Where to put this key?
Go to Multiplayer Options -> Key code.
Download link:
http://sharecash.org/download.php?file=2546135
Have fun!