Derickda1

So ive been playing Tekkit Lite, I love it but theres only 1 problem. I lag pretty bad, I get around 25 fps or so. I decided to download Optifine to get rid of some lag. So I copied the zip files to the modpack.jar and then launched Tekkit Lite. I tried starting my world but it freezes on "Loading World Building Terrain" every single time. It was working perfectly fine before I downloaded Optifine . Please help :(