You can use this instead of HDToolbox:
http://www.aminet.net/package.php?pa...isc/hdinst.lha
For installing Workbench, just copy all files from the floppies onto your boot partition. Fonts, Locale and Storage get their own drawer, the files from Workbench and Extras belong into the main directory. Make sure that all files are copied, i.e. better use the Copy command in a Shell window.