In my own efforts to restore a PowerMac 7500, it took a fair amount of
time to get the right CD-ROM extension and Drive Setup versions to
make it possible to use the non-Apple branded DVD-ROM and hard drive I
had. Trying to help fellow enthusiasts, I'm uploading the floppy image
with these versions for any other classic, SCSI based, Macintosh when
you can't source working Apple-branded/manufactured CD/DVD-ROM or hard
drives. This floppy image contains the following utilities:

Apple CD-ROM Extension vD2-5.3.1 (11/18/1996 release date)
Apple Drive Setup v1.7.3 (5/15/1999 release date)
Aladdin Expander 5.5 Installer
The CD-ROM extension is a bugged version from Apple that does not
perform the Apple drive firmware check and works with non-Apple SCSI
drives. The Drive Setup is another bugged version that allows the
partitioning/formatting of non-Apple SCSI hard drives. Finally,
Aladdin Expander makes it easier to install the necessary software to
expand compressed images without needing to uncompress them prior to
upload/copy.

Compatibility
Architecture: 68k PPC

Macintosh v7.1 - v8.5 (v9.0 and above no longer need this)