this preview is not your ordanary preview its what we like to call a "Semi-Preview"
Download Instructions (other):
1. Download the jar
2. Open your Minecraft Launcher dir and place the new jar there
3. Open your Minecraft Launcher and press "login"
Download Instructions (Recomended):
1. Download the launcher Here
2. Open the launcher
3. Login to your Minecraft Account
4. Press "Launch"
Jar is downloadable Here