I never tried if this is true then the only way to do it is make a mod of your faction.

I believe that you have to change a tag in the custom faction if you are using the expanded faction mod:

From Heavenfall:

Most custom factions will be broken by this mod (unable to build basic buildings). To fix this, open up your documents\my games\elemental\race\ and edit the file with the name of your faction. You should change <RaceClassification>something</RaceClassification> into <RaceClassification>Men</RaceClassification> for kingdoms, and <RaceClassification>Fallen</RaceClassification> for empires.

Gauntlet what you are describing is a game error and has nothing to do with ExpandedFactions.

I don't know of a solution, however, based on faction mods I've done, I can say that there is a tag in custom factions preveting them from appearing in the "enemy faction" list.

I suggest that you compare the xml in the custom faction to one found in coreraceconfigs.xml, and determine what tag is only used in the custom faction. Then you can delete that, and your custom faction should appear as an "enemy faction".

I don't have access to the xml right now, but I do believe there is a tag in the custom faction that is literally called "iscustomfaction" or something very similar. This is not present in the core raceconfigs.

What Murteas described above is correct, however, it is a separate issue.

Reinstall didn't help.

Booo Hisss

Yup, that did the trick, I was accidentally modifying something like faction alignment (kingdom/Empire). Thanks allot for the help guys.