As posted above, make sure that the hard disk and cdrom are set as master and slave respectively by using the jumpes on the back of them. HD = master cd = slave.
then unarchive idefix97
run the install program from the folder, this should (from memory) show list of cd drives that are connected properly to the system, then once selected it continues the install of idefix to the harddisk, when wb reboots you get the demo version prompt and once you click ok you should be able to insert cd and workbench will show on desktop.