Persian MO released a new coop mission for Arma 2 in the BI forums.

Quote Persian MO :
52th regular infantry advancing to enemy artillery position and try to destroy it. In middle way they must help a village to push-back enemy recon forces.
After this Infantry Section keep on advancing to enemy H.Q and disable all communications.
Enemy patrol forces are heavy.they will supported with special forces and mechanized sections.they supported by artillery fire too.
Just one life so first stay alive.