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I think you want the Sims Cheats Enabler, which you can find just a couple of posts below yours, at
https://modthesims.info/showthread.php?t=661787.
I don't know which of the many cheats was used, but if you bring up the cheat console by typing Ctrl, Shift, and C all at the same time, you can type "help" into it and get a list of the possible commands. Experiment with the ones that sound likely, then come back and tell us what you found.
I've made some mods for The Sims 1 -- yes, The Sims ONE :-) -- which you can find at
http://corylea.com/Sims1ModsByCorylea.html