Hi BlackAce:
Phantom Screens offers large retractable screens (Executive screens) suitable for porches and other covered outdoor openings. While the majority of Executive screens are motorized, it is possible to order a manual unit - the availability will depend on your porch height and mesh choice. You can start by calling 1-888-PHANTOM to talk to Phantom Screens distributor in your area (or go to http://www.phantomscreens.com/where-to-purchase/ and enter your zip code to find a distributor in your area). Manual units, while available, are not common as most homeowners prefer motorized units (you`ll need to be prepared to use the hand crank to manually raise and lower the screens).

Here is a link that might be useful: Phantom Screens: manufacturer of retractable screens for doors, windows, and large openings

You can have a porch enclosure done using custom fabricated glass panels and doors made from aluminium rails.

Here is a link that might be useful: porch enclosures

I've been wondering about the possibility of using eze-breeze garage doors as a large retractable screen. I was thinking for screening in a pool or patio - but I don't know how it would be.

Here is a link that might be useful: Eze breeze garage door screens