I'm 50% of the vendorship 

If you go to my webiste at www.digitaldesktops.biz you will see a Tutorials link in the menu.  It is listed there (5th one down) showing screenshots.  They are for P5 but the nodes are the same in 6 and 7.  This is for using billboard props but the actions are the same for the backgrounds.

You could have contacted me directly and would probably have got a much quicker response.

Gill