Unfortunately I'm going to take a break on playing Arma2 after finishing Dogs Of War (for the second time), but well that can take more than 2 tuesday nights since its a longest mission there is. I host tuesday evening/night with server name usually there is just 2 or 3 of us, so if you wish to join, then PM me. Singleplayer->Campaign->Host->(change Host: LAN to Host: Internet)->OK and so on. You can host coop yourself and play like singleplayer until someone joins in and takes control of one of your AI teammates.