Ussually the Add Printer ootion in the cups interface will list the printers. But you can"t access it for some reason. You can try reading the cups man page, or the actual cups site to see if there are some line commands you can use.
Did you post that you cannot access the printer from Windows 8 either? If so, you may have something misconfigured in the printer itself. If possible, you may want- need- to reset to factory defaults. Once that is done, see if Windows can find/install the printer without using any setup disc. You can try with Vsido, but if cups is broken as well it will be a no go