The Sims 3 - Editing Sims after creation?

Hallo! So, basically i would like to get my Sim back into the CAS mode. The reason being is that i have recently installed the Late Night expansion and i would like to give my existing sims more... well, 'substantial' breasts :3 I have Awesomemod installed because i heard that you could edit Sims using that but i cannot figure out how. I also wanted to install SuperComputer because i KNOW that you can edit sims with that, but ts3.tscexchange.com is not working at the moment :/ Does anyone know how to do this, Awesomemod or otherwise? Thanks! :D