No. It will only enhance your game/ or make you a lazy sim player, however you view it, it should not crash your game. If your game is crashing you are probably low on memory. If your memory is low your game will stall, take forever to load, black-out, etc. I love to use the cheats because I feel like it allows me to explore more and play around in the game and not worry about negatively impacting my sims. However, my cousin feels that it takes the true sport out of playing the game. Try it out and see how you like it.. Everyone is different you may like it or you may not, but the good thing is its always optional and can be added or taken away at any time. Happy Gaming!
Oh, and P.S. in order for this cheat or any cheat to work, you have to put it in EXACTLY as it is listed or it will not work. I have created a complete book with all of the cheats I have found or come across playing the Sims. I can not wait for Sims 3! I am hoping that all the cheats that work for Sims 2 will work or I will be compling a list and creating a new book! Some of my friends have offered money for the book that I have now! LOL Good Luck!