MagisterCultuum
Great Sage
First, you need Beyond the Sword, the latest expansion pack for Civ IV (abbreviated BtS). This usually costs about $29.95. All versions of FfH after 0.23 will run on this expansion rather than vanilla Civ IV. The Beta is version 0.24, which is just an attempt to convert FfH to the BtS. It would be installed in the mods folder within the Beyond the Sword folder instead of the normal mods folder. It still has many bugs to work out, and doesn't have as many features as .23c, the last installment of the "Fire" phase. After that will come the next phase, "Shadow," which will take full advantage of the new capacities that the expansion adds, will improve the Sidar and Svaltafar (and make them playable), introduce more spheres of magic, and add 2 new religions (the Empyrean and the Council of Esus) worshiping the deities of 2 of these spheres (Sun and Shadow).