There's tons of info on BF2 dedicated servers available online, but if you'd like a run down on it, let me know.* OR, the more customizable but also a bit more complex method, use a dedicated server. Now to actually play the maps on LAN, you have to either use 'create custom game' in the multiplayer menu and adjust your settings as you want them and start the round, then who ever is playing with you via LAN can just has to go to Multiplayer>connect to IP>enter the IP of the host's (you) machine.

However, there are some that just don't support CoOp at all, I've only had a few maps across 5 mods that don't. I use BF2ALL64.Ī lot of other mods that have custom maps usually support 32 and 64 sizes by default, such as AIX2, ZCF2, etc.

For that, you need a mod that unlocks higher sizes for CoOp. Firstly, if you're talking about vanilla BF2, it doesn't support maps over size 16 in CoOp.