This is a small mod to improve the realism and playability of Africa in a modular fashion (that is, it should be easy to use it in conjunction with other mods or with the house rules you already have). It's also intended as a resource for other modders.
*** NEW VERSION IN POST 13 ***
In particular, these mods don't change the map (to avoid cache issues) and don't add new countries (so they should be compatable with Helius' AI mod, in particular.)
I've included two versions of the mod. The first expands the cultures of Africa, gives African countries cavalry and the abilities to build forts and send traders to CoTs they know about, increases the diversity of trade goods in African provinces with "unknown" trade goods (so that something other than "grain" can be found in the deep Sahara, for example), tweaks province values, and adds forts to the provinces of African nations. It is good if you are playing a non-African country and want to make Africa a little more detailed and realistic.
The second changes the trade system a little (gold is now a regular trade good), the religion system ("Shamanic" countries are no longer annexable and all African pagans are "Shamanic"), the tech groups (mainly for mapping reasons), and the rules for "tribal" countries (extensively). It is intended for people playing African countries (although the experience of those really needs more countries, for both realism and playability, which this mod doesn't provide.)
The details are in the (very long) second post.
EDIT: and of course I forgot to mention one of the most important things. The culture file in this mod is based on one of the earlier drafts of Jordarkelf's Dynasties micro-mod, and a number of additional changes have been made to the culture file here based on posts in the "Dynasties" thread. So credit and thanks to Jordarkelf and posters .