I took the liberty of making a wiki page
OOTP Community Wiki | silvam14 3D ballpark models
and gallery
OOTP Community Wiki | silvam14's park files
I'll try and keep up, but the wiki gallery is drag and drop up to 32mb & editing a wikipage is no harder than a forum post.
creating, on the other hand is a little bit (but not a whole lot) more complex. so I am starting as many pages as I can
edit: added a link on the wiki page back to this thread, forgot it the first time.