It is possible, using a combination of mods and EA debug commands, to add Sims to custom worlds using Edit-In-Game in the Create-A-World tool (CAW). Please check out the discussion page for less substantiated research and areas to look into. 3.5 Step Four: Reset motives before saving.3.4 Step Three: How to add premade Sims.3.2 Step One: Using the Make Sim command in Edit-In-Game.