Problems on The Sims 3 Generations

I downloaded The Sims 3 Generations, i followed the instructions but when i opened the setup launcher with my WinRaR program it said that i had to install the game before i start the setup. Could you help me? I tried looking at all of the folders for the base game but i couldn't find anything.

Hello,

It means you need the base game first, in order to install Generations, which is an expansion.
You can download the base game from www.games4theworld.org under "Downloads". It's called "The Sims 3". You need it in order to install any expansion(s).

After downloading the base game, please follow these instructions very carefully: https://games4theworld.forumotion.com/t1171-must-read-how-to-install-the-sims-3-correctly

let me know the result when done. Good luck!