Zoe wrote:
am planning to replace two windows (single pane, aluminum frame, window
panels fold sideways out for ventilation)
each new window must pass new requirement for storm force winds but all big
box shops in our area carry these from multiple manufacturers

house is block construction, built circa 1960-1962 and located in the deep
southeast

am hoping someone can give me couple tips on how to proceed on the following

1. it's my understanding that the aluminum metal frame sits in the window
opening but is covered by a small amount of cement/stucco (half inch to one
inch?) all around the frame

2. if I knock out this stucco, the frame should then sit on a wood frame
where it can be unscrewed and disposed of

3. assuming for the moment that my window sizes are available, the
installation steps are roughly the reverse of 2 and 1

4. is it better for purchase from local "window specialist" businesses or
from the big box shops (ie. lowes, home depot)

as I'm sure I'm missing something, would someone please post a couple
comment.
any links to websites with examples or how-to's would also be welcome.

Best and easiest way is to install custom sized window in your rough
openings. Order what you need through any box storte as they all
handle good brands. Andersen, Pella, Marvin, others will have posted
installation instructions on their web sites. Read them and purchase
tools you don't own before starting. Window installs are a two people
job for some types, so be sure to have help on hand. First step,
expose the wood framing that the new window will mount on so you have
the exact rough opening. Check that the opening will be square, plumb
and level and plan to make it so with glue up shims or stock removal,
whatever, as necessary.
The time you save by using custom ordered sizes will worth far more
than trying to cobble up a window opening to fit something that
happens to be in stock. If you're lucky, the builder of your palace
may have used a size still currently sold.
Considering the reputed quality of craftsmanship in your area you
would be far better off doing much of the work yourself with casual
help than employ some of the jack legs that claim to be specialists.
HTH

Joe