The sims 3 ambitions installation issue

I have the sims 3 original base game and i want to install the sims 3 ambitions and late night. What to i have to do? Which one should i install first?

Its necessary to install the fix?

Thank you.

Hello,

There's no specific installation order, just follow these instructions: https://games4theworld.forumotion.com/t1171-must-read-how-to-install-the-sims-3-correctly