There is a way, but it's not a beginners project. It involves editing code (called BHAVs in sims 2). The section for modding questions is here. http://modthesims.info/f/555/ You can find tutorials and questions answered by other people. I don't know if you have ever made CC before, but the most common advice is to start small with something like a recolor, to familiarize yourself with SimPE.