This is how I setup a custom world in The Sims 3, starting from scratch and building up my world from nothing (similar to my Sims 2 method).
Creating A World with The Sims 4 Create A World Mod!
How to Create Unique Sims in The Sims 3 ~ New CAS Generator
Cindy Pleasant Sims
Play Sims 1 Widescreen & Windowed Mode (Windows 10)
Home Regions by Kuttoe
The Sims 3 Create a World Introduction
CAW Tips and Tricks: Shortcuts to Cut Down on World Building – The
Lucky Scholastic Book Club form, A shining testament to my
Pessoas, Games, Gamers, Cavalos… — dia a dia, bit a bit, jogos de