Old Tekkit map converted and jungle has spawned. Please help.

[Philly67]

My friends and I had a tekkit map back in April 2012 and I've recently put the old map onto a new tekkit server and the map had to be "converted" I'm using because of the 1.1 - 1.2 map generation upgrade. So I converted to map and a jungle biome has spawned over half of where all our stuff was. Cuts right down the middle. I still have the original none converted map. Is there anyway I can play it without having the jungle spawn on top?

Any help would be amazing, thank you