The Gaia mod adds a new Climate option to game creation. This Climate change will affect any compatible map (some maps, like Hub, have skewed climate settings, which will be unaffected) causing them to be generated without any desert, tundra or ice land squares (ice can still appear on water squares).
While this ensures that all land squares are usable (barring Mountains), it does have the side-effect of removing some luxuries from the game (ones that require desert, tundra or ice to exist). Note, no resource that impacts units is removed.
Gaia should NOT be installed in your main Civ IV location, as it will overwrite necessary files. Instead, it should be installed at: "My Documents\My Games\Civilization 4".
Bh
While this ensures that all land squares are usable (barring Mountains), it does have the side-effect of removing some luxuries from the game (ones that require desert, tundra or ice to exist). Note, no resource that impacts units is removed.
Gaia should NOT be installed in your main Civ IV location, as it will overwrite necessary files. Instead, it should be installed at: "My Documents\My Games\Civilization 4".
Bh