I finally had my attic stairs installed, hired a carpenter and his assistant and it was well worth it. I did assist a bit, moving some of the wiring and in the ongoing decisionmaking about where to locate the opening and so forth.
Here's some photos:
You can just see the end of this part of the attic about 55-60 feet away in this photo, the new floor will add a little over 500 square feet of storage space. My imprecise measurement is 9' 3" wide by 56'. The insulation is blown in loose fiberglass. The area where the stairs is located wasn't insulated being originally designed and built as a garage, so it has 6 inches of unfaced pink fiberglass rolls.
Things to do are move more wiring, move four recessed lights that are now kitchen lights, the kitchen is going to be relocated in the house so I won't need these lights which stand proud of the ceiling joists by several inches. The small 1x4's were used to position the trusses during construction, so the some will be removed for the flooring. This last is repetive, but is sans flash.
The bedroom wing of the house has an unfloored attic space as well, but unless we find a need for more than 500 sq. ft., we have no plans to develope that.