Although there is no ide-cdrom is /lib/modules/xxx where xxx is the path for this kernel, there was evidence for ide-cdrom in /boot/System-map-2.6.9-34.EL . I modified both the grub configuration file and /etc/lilo.conf with vi (a plain ASCII text editor), as I use lilo to boot.
The modification was replacement of hdb=ide-scsi by hdb=ide-cdrom in the append stanza for this kernel.
This worked and Nero seems to see the drive (correctly identifying the Toshiba model number as seen in the kernel table and by xcdroast). Moreover, when Nero is not in use, the regular CD-ROM automounter works and I can read CD-ROMs from the same drive.
However, none of the other devices for this removable bay seem to work; in particular, the Zip drive is no longer recognized, in part because the Zip is not an ISO-9660 file system but rather a MS file system recognized by linux. Do you know of a fix for this issue? Do I need to change the lilo.conf stanza each time to get different devices to work, then run lilo, and then reboot?