Awesome mod keep up the good work!!! btw your rpg pack was my favorite part of extrabiomes it's too bad you guys weren't able to work things out but either way life goes on and once again keep up the good work!!
but the tundra is still a biome .--. its just rare
Nope. They're called Ice Plains in vanilla MC. Not to mention, it has grass, trees, and flowers, where as the Tundra doesn't have any vegetation. The Tundra is also a lot flatter, and has more frozen lakes due to its flatness.
I could do that without ModLoader, although I don't have any plans to do so at the current time.
The adding generation as a new world type was a compatibility suggestion, for if you do decide to use modloader. As it is, the mod is incompatible with several others that modify world generation, and modloader, due to its hooks into world generation.