This does seem like something obvious that would be in an FAQ, but I can't see anything...
A friend of mine has installed the mod to:
C:\Program Files\Steam\steamapps\common\sid meier's civilization iv beyond the sword\
He has the folders sitting in there all correctly... but the mods aren't appearing under "Load a mod" on the advanced menu: is this because it's a steam copy?
A friend of mine has installed the mod to:
C:\Program Files\Steam\steamapps\common\sid meier's civilization iv beyond the sword\
He has the folders sitting in there all correctly... but the mods aren't appearing under "Load a mod" on the advanced menu: is this because it's a steam copy?