Hello, I wanted to use this plugin.
But I would like to create Minecraft Default terrain.
Am I able to customize Minecraft Default terrain?

The biome placement generator isn't fully updated for 1.7 yet, so there will be differences between the vanilla and Terrain Control layout. You can set BiomeMode (WorldConfig) to Default to use the vanilla biome generator. You won't be able to change the placement of your biomes, but you can change the look of the biomes.

Anyways, I'm closing this report, as it is not a valid bug report or feature request. We have a support and discussion forum over here.