Thank you for replying.
According to curse, it's for 1.7.10 (https://minecraft.curseforge.com/projects/zetta-industries/files/2482398). I used third-party sites because I was just in a bit of a rush, and got the wrong versions because I was a bit tired. I'm loading the mods in Minecraft as it's far easier to troubleshoot that way, then uploading it to technic as a modpack. I was told to put the files from the jar of optifine to the forge file to install Optifine onto it, but I've probably broken it with that.
Thanks a lot for the help and sorry for my idiocy with trying to create the mo