Quote fromThis is a mod? wtf?
I could make this with biome terrain generator in seconds, no mods required.
Or, you could find one of the many times maps have been posted providing this type of environment and just make a backup copy of it. Or, you could accept someone made a simple altered rx.class file that, unlike the BTM, takes only seconds to deal with to produce a simple flat map. I don't know if this qualifies as a mod per se, but whatever it qualifies as it's certainly useful to those who just want a simple on-demand flat grass map.