Thanks for your help. Your suggestion tough did not worked. I have the Standard Version of CIV 4, the problem was that i once had to reeinstall Windows, and so the registry for CIV was gone, but the game runs without a problem.
I know in which directory Mods have to be installed, at least if this mod install like every other mod.
You have standard CIV 4, with Beyond the Sword installed? What patch level are you at?