you could also try Lucas' Sims 2 Easy Cheats. It's a tiny program that you run in the background that uses a combination of keystrokes to input your cheats for you.
http://www.aussietopenders-sims2.com/Programs.htmIt has to be open/running in the background or it won't work.
Another trick to remember is that if you have already typed in a cheat while playing, you can open your cheat box and hit the up arrow on your keyboard to cycle through the cheats you have used during your current session.