Re: Sims 3 Won't Launch, Only World Adventures
I think you misunderstood roberta591.
The game works as follows: You always play all expansion packs and the base game at the same time. So if you have both WA and the base game installed, you have contents from both in your game. That does not mean that you have to USE all the content. You can play any savegame you might have started before installing World Adventures and you do not need to go to any of the foreign towns.
Because you play all together, the game requires you to put the WA disc in. It looks for the DVD that was last released that you have installed (which in your case is world adventures).
So put the WA disc in and enjoy the game.
Only way to play the base game alone is to uninstall world adventures or use a third party tool but that should not be necessary cause you can still play base game only by just not using the features WA offers.