A few days ago an alterOps ALPHA was released, however, to be able to play some requeriments are needed.
1-. To be registered on aIW BEFORE february 22, 2011.
2-. To have 25 posts or comments.
it's recomended to follow the instructions given at http://alteriw.net . but if you are too lazy to go there look down:
1-. To have an steam version of the game (original or cracked).
2-. Download the file aO.rar (at the end of the post).
3-. Copy the files inside aO.rar to the game folder.
4-. Execute alterOps.exe (as administrator) to verify that you have the last version.
5-. Execute BlackOpsMP.exe
6-. Login with your aIW username and password
Optional: if you want the DLC maps.
1-. Download the file 4DLCBO.rar (at the end of the post)
2-. Copy the files of the bo.dlc folder (inside 4DLCBO.rar) to the cracked game folder.