I downloaded S2Pets, and when I went to play, all of my sims had been replaced with the default sims you start the game with. I only saved my neighborhoods in a compressed file in my documents, but I do not know how to reintegrate this file back into the game, or even if I saved the right file. Is there any way I can play my sims again?
You'll need to uncompress the file before you put it back in. But you should be able to go to My Documents/Electronic Arts/The Sims 2 and replace it under neighborhoods.