Step 2: Find your disc
To the best of my knowledge, you are allowed to rip a game disc or OS CD and have an extra copy on hand incase of damage to the original. Do not by any means distribute it, because that is illegal. DVD's I am unsure of the legalities of ripping, so do so at your own risk. I have not personally tried it, but it may not be too safe.
Now. Let's get started.