welp, I'm sorta going through something like this right now. What has been suggested to me (among other things)

make a separate Runtime folder (outside Poser). Create folders in wherever needed (geometries, libraries, textures, whatever).

Copy the files you made into the folders they should go in to. (There should be a chart in the Back Room in the title of the forum here explaining where things go) .

Zip the Runtime directory you created. Include a Readme file to let people ( and this is just personal preference)
What it is
What it's for
Who made it, and how to reach them
any restrictions on use you think it needs.

then post it somewhere like ShareCG, or wherever you want, and then go to Freebies and set up the link. It usually takes a couple days, but can take longer if they're backlogged.

Hope that helped.

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)