Expanding aliens, Sixam and alien lore in the Sims (expansion)?

I like that they have powers and can be disguised, but I don’t like that they walk around my town in their alien state, (especially hairless). I don’t use custom content so I would love to see an alien world where they can live, alien clothes and alien furniture. Maybe even some alien devices rather like the scientist can make. And they should be able to use a space ship ( shaped like the one they abduct them in) to go to and from their alien world where they can live, to the rest of the sim world.