Getting gravestone?

Its one of the secret options unlocked with testing cheats enabled, you have to shift click the batbox with the ghost sim made selectable, sometimes it takes a few tries due to how fast the game tries to get rid of selectable dead sims, but this is pretty much the best way to generate tombstones for sims with orphaned data, like Skip Broke, and all the ancestors of Riverblossom Hills. I wasnt able to make it work with Life Stories however, wanted to make Bailey Fortuna a tombstone.