The word from Canon is that I need the original s/w (which the seller should have, he doesnt) but is available from their website, which it isnt.
Now, assuming I had the s/w originally and its been damaged where would that leave me, I know up **** creek without a paddle.
So, sorry but cant help you and I'm guessing that if I do get an old copy it wont work with Vista HP, although I seem to remember you can 'fiddle it' so windows thinks its an earlier version.
Matt