I will provide here a link (on MediaFire) to the mod scenario World 2013 I contributed to, you can feel free however to try any other mod or scenario, it is entirely up to you.
Unfortunately not all material can be hosted on the forums due to their limited resources and abundance of files thus the larger files are hosted on third party free hosting sites. One such forum is Civfanatics, is where you can find alot of material regarding Civilization. In the case of CIV 4 it existed before Steam, and was being modified on many diffrent web forums.
For instance CIV 4 was created with mod-ability in mind and was one of the first games developed with the involving the community mind set. Not all games are mod-able and some are more so than others. Normally finding gaming modifications is not hard, even more so with the emergence of the workshop on Steam where the community has been converging tons of user created material. How do you install mods in civ 4 When I download a mod,I download a compressed zipped file(it shows a zipper on it)so I go into 7zip and extract the folder,after that the file is still a compressed zipped file.So then I move the folder into steam/steam apps/common/sid meires civilization 4 beyond the sword/mods.And when I go to play the game it doesnt show the mod in the advanced section.
