You need a real 3.1 ROM for OS3.9 to work. BlizKicking 3.1 over 3.0 won't work. If cybscsi.device is available in the SCSI ROM after cold boot then you can just change the mountlist of the CD0 mountlist to use cybscsi.device (and the correct unit number). If cybscsi.device exists as a file in devs:, then you will have to copy it to the DEVS drawer on the emergency floppy.
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moto