It seemed helpful, so I have made a program that will swap
your Minecraft 1.0.0 and 1.8.1 .jar files quickly. This is so
that you can go on old servers that haven't updated yet,
or to play mods that haven't updated.
It's also able to download the 1.8.1 beta .jar file as well...
Get it here!
Obviously, unpack and run setup to use.
