Thanks for that, Bloodwych.
I'm at a loss to explain it too. I've managed to get some additional drives to appear but can't get DOpus to recognise them yet as I want to extract some LZX files. I need to get DOpus to allow me to set up a directory to unpack the files into ( I have one set up ready on my PC) but I don't know how to do that. Any ideas please?