If you have spend so much money on a big collection, why are you still using the slowest method of installing Workbench???
Just copy the Workbench files manually, it's much easier than using the installer provided.
Boot up with the Workbench disk, open a CLI and copy the files from the Workbench disk to your formatted boot partition.
Copy all DF0: to should do the trick, in case you have booted from DF0 and know the drive name of the bootpartition, usually DH0:.
