DeleteDiskObject(name)(a0)              - Delete a Workbench disk object
                                          from disk.
GetDefDiskObject(type)(d0)              - Read default wb disk object from
                                          disk.       (V36)
GetDiskObjectNew(name)(a0)              - Read in a Workbench disk object
                                          from disk.
PutDefDiskObject(diskObject)(a0)        - Write disk object as the default
                                          for its type.  (V36)