>>Go to the next one that's linked at the bottom. it does mention /A, but doesn't give any further detail than "administrator mode".
>
>setup /a -- Starts an administrative Setup program that
>places Windows onto a network server. Setup expands and copies all the
>files on every disk to a given directory and then marks the files
>read-only.

Where did you find that? What does it "places Windows onto a network server". Oh... this must mean that setup /a is only for the installation of Windows itself?!