Multiplayer campaign saving mod

[microplite]

Hello everyone, here is my problem :
I use to play with my friend in the coop campaign option of the FAF client, but we are only able to play few hour each day together, so we never had the time to end a campaign mission. I've seen in other topics that there are mods that can allow us to save a game, but they never mentioned the names of these mods, so if anyone know one of these, I would be glad to hear it.
Thank you