Tallima: I've spent the last 4 days trying to get it working. I think it'll work today. Can you play any coop with someone with a different version than yours? Or do you need the same version for coop play?
I have Opposing Fronts. I was hoping to get my bro the first one.
It does not matter if you have CoH, OF or ToV, you can play with anyone. The game you own just limits which factions you can choose in multiplayer - for example if you own only OF, you can only play as Panzer Elite or Commonwealth. Just have the game patched (current patch is 2.602, I believe) and there you go. You can play either skirmish match together or MP, if you both have ToV, then you can play those three extra multiplayer modes (Operation: Panzerkrieg, Operation: Stonewall and Operation: Assault).