Thread:TkaiaWolf/@comment-5525546-20130119063219/@comment-5116706-20130124025609

I know of a tool that allows you to change your .jar to any Minecraft version, from Infdev to present. Here's the link:

http://www.minecraftforum.net/topic/877629-minecraft-version-changer-windows│mac│linux-500k-downloads-indev-latest-snapshot/