I think you're missing disks if that's all you've got :/
I'm not sure since I have never really used wb 2.05 but atleast wb2.1 is on more diskettes, I would guess you'll need workbench, extras, fonts (and maybe storage and locale?) .
and if things aren't changed completely in 2.05 hdtoolbox is on the install disk and not on workbench. and install I think only came with computers that had a HD.
