need help editing Full of Resources terrain

[[to_xp]Gekko]

The Balanced mapscript tweaks TerrainGenerator a bit in order to remove some bad terrain ( snow/tundra, jungle and deserts ) . I'm trying to get the same behaviour from the Pangaea code bundled with Full of Resources, however the terrain generation code there is a bit different and I can't figure out how :/

Thanks in advance for any help!