Quote Originally Posted by oldnfaded
Can anyone either confirm my fears or point me to a solution.

Can I for instance leave say factions 01 to 10 unused in the second mod and use factions 11 to 20 . (Not tried that, wonder if it would work?)
Hello oldnfaded

You have your solution. What I would advise you to do is:
-first make a rewriting mod for MTW so you can have 3 campaigns and all the renamed factions (FN_FACTION_NAME_FIRST - FN_FACTION_NAME_LAST), actually with that only you'd be able to have three campaigns set in different eras and using different factions. If you need more factions and campaigns (and so campaign descriptions) you can always make expansion games, think how many you could do with 40 (FN_01 - FN_40) factions that you can always rename for every single campaing...

I hope this will help.

Regards
EC