https://forums.totalwar.org/vb/showthread.php?t=95664
Quote Originally Posted by Ferromancer View Post
Main:
Checking this box will allow you to play ANY VERSION of Europa Barbarorum with Barbarian Invasion, past, present, and future. It will basically be the same EB as you're used to, only the AI will be much more advanced and challenging, and will be able to conduct naval invasions. If you only check this box, other mods can be installed after this installer without being screwed up.
All the other options are outdated, so don't check them when you download.