Reinstalled, still the same issue. I have posted screenshots of first the error message and then just the screen I get if I try to start a new game.
It is installed in the My Games directory, although that is where the newer single player version of Rhyes is installed as BTS complete comes with an old version, which runs fine. Also there is the fact it does recognise and load up even though you cannot play a game through it.
Anyone any other suggestions. No idea.
I have the steam version as well. The mod should simply be placed under "C:\(...)\Steam\steamapps\common\Sid Meier's Civilization IV Beyond the Sword\Beyond the Sword\Mods"
Perhaps you're putting it in the first mod folder and not the one under "Beyond the Sword"?