...more problems raised their ugly heads - namely, it didn't work! I knew that the LIS was receiving power, because the lights came on, but it seemed that despite this no-one was home; nothing was coming up on the LCD. Thus I deduced that it must be a problem with the serial port and not the USB, so I took the computer apart again, and first of all checked that the wire was pushed firmly into the L.I.S and tried a different serial port. Next step was to get online and have a browse about. What do you know? I found a latest software update here, and even better a pictorial installation guide. All of a sudden, Bingo! The LIS was up and running :-) ...