Ok,
Copying the MagicWB CDRom icon into the Workbench:
Prefs/Env-Archive/Sys drawer and renaming it for each
of the possible CD rom drives that could be mounted, worked.
However the MagicWB icon is set as a Project Icon, so you
then have to go and edit each one with IconEdit and change
it to a disk icon.
After that it shows up just fine.
I actually looked in the Workbench:Prefs/Env-Archive/Sys,
drawer before I posted this, but I looked in workbench,
I forgot that disk icons are invisible and can only be
seen in the Shell/Cli.
Thanks for the help
Wildstar1063