Thanks to
Asle and
his website, I have been able to fix four bad sectors on
Black Label Demo Disk 8 by importing
ACF-FutureIntro09 and
Prophets-GuruMastersIntro to replace the damaged files
7 and
5, respectively.
Disk Blocks 574, 604, 623 and 729 are now fixed, and there are now just 8 bad sectors in the attached disk image.
In the meantime, the search for valid files to replace the damaged ones continues, as does my effort to salvage the bad data blocks...