I think the best option is adding a new world and keeping the old one's.
Especially since we could enforce HC rules on the new world where creepers
HC is shite for building though. And what do the majority of us do...build?
Wipe the lot and lets vandalize Toht's work with gay slogans and man love pictures.
Using this texture pack for 1.8
[16x, 32x, 64x, 128x, 256x, 512x][1.8] Sphax PureBDCraft +Aether&Zipline! (v0.8.1 - 12/09/11) - Minecraft Forum
Tis rather mint I must admit, only using the 128x one the 256/512x ones seem very unstable.