Heres the new Modern Warfare 2 Multiplayer Crack Tested and Working 7/10/2010
1. Install COD:MW2 via DVD (the SKIDROW version is recommended) or Steam.
2. Find the installation directory (i.e. C:Program Files ... Call of Duty - Modern Warfare 2).
3. Extract the new files to the installation directory.
5. Run 'iw4mp.exe' by hand or from the shortcut on your Desktop.
6. Run 'alterIWnet_configure.exe' from the installation directory and edit your nickname. Enjoy!
7.if you have any trouble playing single player after applying the crack then just block alterIWnet_configure.exe (can be found in installation directory) using a firewall eg zonealarm, comodo, norton etc.