Download my .jar and replace yours, or download from there site and install it manually, up 2 you. You want to follow how they do it http://www.minecraftforum.net/topic/249637-125-optifine-hd-a6-fps-boost-hd-textures-aa-af-and-more/ Want to be lazy and use my minecraft.jar (Its safe don't worry) http://lh.rs/Uv5JChD2BSd3 Weird link.. Its the new localhost Video of how to replace the minecraft.jar , And what this mod has in it. (Video still being processed, So may be jumpy until the finished)