As always, it’s always a pleasurable experience when installing a new update or game. There is no telling what could happen – your game to install perfectly fine without a glitch, or you may just find yourself with a melted piece of plastic in your DVD tray*. Sims 3 Gamer wrote an article with a few important things to mention before installing your game. It’s mostly the standard remove all mods, update the game, etc. Have a read here.
* This is a joke, but it could happen…