I'm not sure I entirely understand the question, but to format a hard drive, you need to initialise and partition it with HDToolBox, and - after a reboot - format the partitions using the normal format command. Make sure you set one of the partitions as bootable in HDToolBox and it will boot, then it should just be a case of copying the contents of all the Workbench disks onto it.
Does this answer your question?
Chris