I decided to try to see if i could reverse engineer it as I have not tried to use transparent boxes before and it has come up a treat. I have emailed the original designer seeking his permission to release the theme as GPL into the Moodle community.
Best thing is that the way I have built it, it is very easily customisable by using a 'parent theme' and a single simple css file to make changes to create variations.
To create the many variations below required only 5 changes to a css file.
Have a look, provid feedback/suggestions and hopefully I will be able to release this.