I've compiled an extended list of Cheats and Commands

"Volias;12590736" wrote:
I was hoping we might find one to reset aging. I normally like to keep my personal sim around for all of the EP's, but still allow my legacy family to live and die as normal.

You can shut aging off via the options menu. Just remember to change the setting when you switch games. Not sure you'll stick with one sim that long through. Its going to be at least five to six months before even the first expansion pack is released. That's still a long ways away.