For those purchasing the official release, in case not aware a realworld mod available in the mods section that adds real world information to the game (i.e. names, graphics, etc.)

viewtopic.php?f=268&t=33350

Is there a way to use this in the multiplayer mode? It is making the file too big.

The custom fields increase the file size due to the way the game handles custom imagery. I think I've found some ways to optimize this when using mods. I'll give the modders a chance to test it and then it should be available eventually in a patch.