No the easynet cd details are not installed anywhere apart from on your transfer adapter kit cf card sitting in the pcmcia slot going nowhere ,as it wont install, it said it wants the easynet volume which is sitting in pcmcia slot on a cf card
What the 'assign' command does is create a temporary, make-believe volume called 'Easynet'. The installer is looking for files on that volume, and since those files are in a drawer on the CF card instead of a real volume with that name, you need to use 'assign' to create the imaginary one.