Thanks for that Tony. I didn't need to clean the disc (maybe I'll have a go sometime) - I decided to leave the disc in and the installer trying to work, so overnight my drive was chuntering / chattering away and this morning I found the on the computer screen the installer asking for disc2 - the install completed fine with the other discs. I have not had a good try flying over all of the area of Vol7 to see if the areas covered by the first 10 or so cab files are ok, however my FSX runs fine and I would expect a crash if there were problems with the scenery files.
My system reports that the installed Vol7 file structure is 37.4GB with 918 files and 11 folders, is there any way someone could confirm that that seems correct?
Thanks again
Malcolm
(Now time to work out treescapes now that ESI have gone and then I can install Scotflight ... I don't suppose anyone is looking at making a treescapes for Vol7? )