@ iconoclaST
Are you familiar with Mountlists? They're a little tricky under 1.3.
Each entry begins with the device name, I.E., CD0: and ends with a #.
The 2091 does use scsi.device. Here's what I think your entry should look like.
CD0: Handler = L:BabelCDROMFS
Startup = scsi.device/2
StackSize = 4000
Priority = 10
GlobVec = -1
#
Add it to the end of Devs:Mountlist, then type mount CD0: in a shell. If it works, add that mount command to your startup-sequence or StartupII file.