Attached Link: http://poserpros.com/brokeringfaq/submissionFAQ.html

Well I not sure that is entirely right mkdavis as I think Poser does search for some files in the Poser Runtime directories

Que I have attached a image of the file structure
to help you sort this out.

Why someone at Renderosity did not have enough grey
matter to impose strict rules on .zip files years
ago is beyond me.

Check out PoserPros to see how it should have been done
http://poserpros.com/brokeringfaq/submissionFAQ.html