TerrainVersionChanger allows to use terrain generator from any Minecraft version you want (initial versions will support only one or a few versions). The idea is simple: server owner puts old Minecraft jar to configuration folder, and plugin loads and transforms classes from that jar file to create terrain generator.
Installation and usage
As with any other plugin, put it into plugins folder and start server. Configuration folder should be created automatically. To generate terrain from a patricular Minecraft version put client/server jar (with that version) to plugins/TerrainVersionChanger. If you don't use multiworld plugin add this to plugin.yml:
worlds: world: generator: TerrainVersionChanger:jarFileNameWithoutDotJar
If you use multiverse use command:
/mv create example NORMAL -g "TerrainVersionChanger:jarFileNameWithoutDotJar"
There is no configuration.