REVIVING THE ONLINE MULTIPLAYER
Mappack1 is a collection of 260 maps and you need to download and install them to join online sessions that use these maps. To install them, simply extract the content of Mappack1.rar anywhere into Document\My Games\Far Cry 2\. (The map files can be anywhere within that location, as the game scans the entire folder structure.) After that, you're ready to join and play on any server with 'Mappack1' in their name. (Note: if you're new to Far Cry 2 multiplayer, or you just found out that the online mode is working again, you also need to use a multiplayer patch first. Scroll down to read more information about it.) Mappack1 was created as a solution to playing on custom maps online, since the map sharing feature of the game is currently not working, and it may take some time until it gets fixed. It is intended for all players and hosts to share in common.
You're welcome to use these maps for your own sessions; the only thing asked is that you put 'Mappack1' and this website in the server's name, to make sure everyone, especially new players, understand at all times what they need to do. One simple format would be: '|Mappack1|FC2mp.com'. It should give you enough room for a unique server name, to be clearly distinguished from all the other servers. (See the picture below.)
Also, if you want to host a server with the maps regularly, please, refrain from using special characters to make your server to be on top of the match list. Let's share the game fairly.