How to play Sims 3 via a CD drive?

I want to play the Sims 3,My sister has a copy of the game,But she's too much of an ****** to share it,I got the disc from her computer,and I made it into a ISO Image,and downloaded a virtual CD drive program called alcohol 120%,However the intro works fine and all,but after that I get a disc authorization error or something,I forgot what it said,How can I run the game?5 stars for working answer!