The Sims 2 Cheats:

To access the cheat menu press the following Ctrl + Shift + C.  On this pop up enter the codes below to access the cheats.

List cheats:
Help -all

Expands or contracts Cheat window:
Expand

Closes Cheat window:
Exit

Clears all cheat codes on the screen, but codes are still in effect:
Clear

Increases game performance but lowers graphics:
Vsync (on/off)

Windowed mode:
-w

Start with desired resolution (in pixels):
-r(width) x (height)

Fullscreen mode:
-f

Disables sound:
-nosound

Get 1000 Cash:
Kaching

50,000 Simoleans:
Motherlode

Puts the game in slow motion. Enter any number that 0 through 8 (0=fastest and 8=slowest):slowmotion

Makes your Sims larger or smaller:
StretchSkeleton

Allows you to change elevation of floor tiles:
Boolprop constrainFloorElevation false

Disables the ability to change elevation of floor tiles:
Boolprop constrainFloorElevation true

Turn on aging:
Aging on

Turn off aging:
Aging off

Turns off facial bounding limitations. It prevents the normal corrections the game will make for two parents with very different facial structures:
FaceBlendLimits (on/off)

You can invite more people to your parties:
IntProp maxNumOfVisitingSims 8

Takes off censoring:
Intprop censorgridsize 0