Mods/Installing OptiForge/Manual Install/With Pre-made JSON

Step 0.
First you must find your .minecraft directory directory. This directory will not exist if you have not run the minecraft launcher at least once. This tutorial will work from within this folder.

Step 1.
Create a new folder in the "versions" directory called "1.6.2 OptiForge 2013.07.17". If you have not run the Minecraft launcher yet, you will also need to create the "versions" directory"

Linux: mkdir -p "$HOME/.minecraft/versions/1.6.2 OptiForge 2013.07.17"

Step 2.
Download this file https://gist.github.com/Higgs1/6024672/raw (Firefox: Right click -> Save Link As...) and save it as "1.6.2 OptiForge 2013.07.17.json" in the new directory. Note the .json extension is important.

Windows: By default, windows systems do not show extensions so you will either need to enable file name extensions, or open Wordpad and paste the code into there and enter the correct file name when you save.

Linux (using wget): wget -c "https://gist.github.com/Higgs1/6024672/raw" -O \ "$HOME/.minecraft/versions/1.6.2 OptiForge 2013.07.17/1.6.2 OptiForge 2013.07.17.json"