I own all of the Stuff, Game and Expansion Packs that are currently available on Origin (12 May 2021)
If you want the rooms to show up as in the preview, you will need: Snowy Escape, City Living, Jungle Adventure, Vampires and Movie Hang out stuff. If you place the room in the Vardo, do check for double windows, doors and all things that are attached to the walls, inside and out, after placing the rooms.

I used the cheats bb.moveobjects, bb.showhiddenobjects and used items from the debug menu. Please use at least the bb.moveobjects before placing the lot. After downloading and installing, the rooms can be found in My Library, under the Advanced tab. Make sure to check include custom content.

Credits: All artists here at TSR whose creations I use with gratitude!