Right clicked on 'Click for download from google drive'
Selected - 'Download linked file'
Gone to 'downloads' file on you Mac
Double clicked on edit.html file
if asked - Opened file (file opens at 100%)
Right clicked and selected - 'Use image as desktop picture?
Yes that works fine, it was just about the right click option which doesn't exist for the Google drive pictures.
Also the "Set as Background" option is greyed out on the Windows XP PC at work.
