I think a lot, if not most, have different runtimes and have a folder above it to name it. I could be wrong. But if not, just unzipping to that folder works just fine.
But if not, then it’s simple enough to drag the Runtime folder onto the Poser Runtime folder and it will just put everything where it belongs. I think most archivers allow drag and drop these days. Mine does, I use IZArc.