so...UPDATE....Problem SOLVED !
- received the new DVD drive, removed the old one, installed the new one....and STILL had the exact same failure message...code 32, another driver, etc......so it wasn't the drive
Tried contacting a Microsoft Help person, and had to cancel out when I found the support was not included as part of the initial purchase price of the Windows 7 64bit ULTIMATE software........you kidding me...!!!!!
FINALLY...I found a useful thread that involved editing the registry......that did the trick. Now the new drive works.....I plan to reinstall the old drive, as I'll bet that it is not defective...
Too bad the MIcrosoft "fix it now" application for this doesn't really work......or at least point to the registry fix solution
to see the fix that worked at this URL, then follow the VISTA commands, (worked for me even though I had WIndows 7 )http://support.microsoft.com/kb/314060