Sorry for the late response, unfortunately I acted rather quickly in making this post as to where I ended up just getting my answer from the chat. Thanks, though. My problem was that I was putting it inside the minecraft.jar not the modpack.jar
I've tried very hard and searched, but I cant get Optifine to work with this pack. Yes, I am using the correct version of Optifine. But it will not work. Is there any way to get it to work with the pack?