Homeless Sims? You can add your creations to homeless Sims? How do you do this and find homeless Sims to begin with?
Go to manage worlds in the main menu. Then in the upper left corner there is a button with kind of like a family on it. It says Household Management. Filter households by "unplayed households" at the top and then "not in world" on the roll down menu. There are all the homeless sims.
Click on one of them, when you click on the "pen" it says edit or remove. Click it and you go to CAS. You can't edit the original sim, but you can add others, and you can delete the original sim without any problems. I have been adding sims from the gallery.