What you need to know:
The cdrom method will find an already mounted CD-ROM or will ask for the device driver that will mount the correct drive. All such drivers are found in /dev and thus, the specification of an sbpcd driver would be /dev/sbpcd0 for the SoundBlaster Pro driver, /dev/scd0 for the first SCSI CD-ROM, and possibly /dev/hdb1 for an IDE ATAPI type drive that is the slave on the first IDE controler.
Once the drive is mounted the next problem is finding the distribution on the CD-ROM. The standard archives, as well as the CDs, use the path debian/dists for all the releases held in the archives. The release archives, called stable are pointed to by a symbolic link in this directory, so the path that dselect is looking for is: debian/dists/stable. dselect will append /main/binary-i386 to obtain the complete path. If you have a nonstandard CD, look for the directory main/binary-i386 and supply the path which leads to it.
It is safe to assume that the archive is standard, since dselect will
notice if it is not and ask again for the location of the top of the archive.
See the Notes section on page
for more details.