Using the "testingcheatsenabled" Command:
This testingcheatsenabled cheat allows you to do several useful things
when used properly. First, hold CTRL+SHIFT+C (CTRL+SHIFT+WindowsKey+C for Vista)
and enterthis code: testingcheatsenabled true
Now, hold SHIFT and click your letterbox. This will provide you with these
Make All Happy
You may also hold SHIFT and click on Sims to get these options:
Add Sim to House
Change Sim Traits
Force All Events
Trigger Age Transition
Modify Traits for Active Sim
Add to Household
Remove a Moodlet from the Moodlet Panel.
Note: If it is motive induced, the bar related to the
negative Moodlet will be completely filled.
In Ground View mode, hold SHIFT and click a spot and your
Sim will teleport to it.