i have just bought the disc on ebay ,oem.landrover pdf form, for the vast amount of £3.50 tried it and it is perfect covers td5 and v8 and freelanders !!!!!!!!!!!!!!!!
Don't think there is an official PDF for '94 discos and earlier. I spent ages trying to find one and gave up and got a paper one second hand. I did find a scanned french pre 95 manual in PDF but it made no sense to me. It's easy to find a '95 onwards PDF though.