OK, started fresh this morning. Was able to actually get the Win8 preview loaded and working. The work-around for the 'missing BOOTMGR error' was as it booted to press F12 to select where to boot from and then choosing the HDD with the OS on it. It then did it's expanding, etc. and finished installing. Now for the BIG test, trying to load the Restore DVD for Vista. I am confident I am making progress.
UPDATE:
Well, that didn't go as planned ... the restore process is still saying "the drive doesn't meet criteria for install"!
Gonna give it another go with the manual in hand and follow step-by-step directions. I was able to re-install Windows 8 preview using the method explained above.
UPDATE 2:
OK, never thought of this, but am doing the upgrade [downgrade
] to Windows 7 over Win8 instead of installing [factory] Vista and then upgrading. Stand by for the results. It *IS* copying files, etc!
UPDATE 3:
OMG - just saw the Windows 7 logo on the screen after a restart!!! I *DO* think it's working! [peeing profusely!!!]