There are numerous updates to the game. Several new units intended to crack stack building have been included, among other things.
Fairy Tale puts the Civilization IV nation building, warring and strategy elements in a Fairy Tale world with witches, knights, elves and damsels in distress. Finally, the better terrain has been incorporated into Fairy Tale.
This is a small patch for Version 6. It is not imperative, but will enhance the enjoyment of the mod.
Update 6b requires the Full Install as well as update 6Aa. The Elchers Clan gets a complete remake in this update and is now a proper Scottish/Celtic Highland clan.
This is Patch 4a For Fairy Tale Version 4. It corrects some pressing issues and adds a new civ too, by the way!