The 3rd GENERATION of Fall from Heaven 2 (FfH2) mod, a.k.a modmodmod Orbis!!! Just install in beyond the sword/mod folder, and RENAME THE MOD FOLDER TO "Orbis" to avoid bugs (the original name of the mod folder must be "Orbis")
If you aren't used to installing games with any frequency, probably you will get in trouble sometimes, and this Tutorial can help or even save you!