The boat I bought in April, hull 143, named GEMINI at the time, came equipped with not 1, but 2 full enclosures. One is screen and fabric (Sunbrella?) and one is clear plastic and fabric. They attach to a long bimini via zippers, and to the aft end of the cabin with snaps. They terminate at the boom gallows, and then the after part continues down to just abaft the lazarette hatch (if I recall correctly) where they fasten with snaps.
The side pieces zip fore and aft to the bimini, and then terminate by zipper at the top of the weather cloths fitted to the life lines on both sides of the cockpit. I have not rigged either the plastic or the screens, but have used the weather cloths (complete with custom sheet pockets) and bimini. I do not have a dodger, but would prefer that to all the enclosures.
Next month when I get back to where the boat (now the DELTA BELLE) lies in Mandeville, LA, I'll be trying to dispose of the plastic/fabric enclosure, but plan to keep the screened one...depending on how much storage space aboard it requires.