Putting a game onto a cd?

How do I burn my Unity3D Game onto a disc?
I want this to be pretty straightforward. I built the game, and now I want to just burn it onto a disc. No special consoles or anything, just import the game onto the disc.
How do I do this? Is there something I can download that’s free, or can I just import it using the Unity engine?

http://answers.unity3d.com/questions/124390/how-do-i-put-my-game-on-disc-.html

this guy explains how