Yep, it's it doesn't matter what figure the prop is parented to. Neither does it have to be smart porped, just so long as it's parented to some figure it will work. It can sometimes be handy to have an invisable minimal figure, with no geometry or materials, particularly if you are making a set. The elements of the set can be smart proped to it so they snap into the correct position relitive to each other, in addition to being able to apply pz2's to the props, you can move, rotate, or scale, the whole set by movion, rotating, etc, the BODY of your invisable minimal figure. You can even put ERC in the figure that will controle slave channels in the props (See my "OmniLight with ERC control", in the free stuff for an example). To make a minimal just convert a Poser square into a figure in the heiarachy editor, then strip out the geometry and materials in a text editor.