Thank you for the explanation, Techo. The exchange of information and ideas in these challenges is great - a neverending learning experience.
I think you choose good - this one I like better than the other... /Oved
I first made out a plain vertical rainbow in the photo editor, outputted that image on to the tv screen used that as the backdrop, and then used that photo as the final backdrop for this shot aswell:
http://www.pbase.com/cslr_challenge/image/49533378 I wasn't sure which one I liked more, the image posted in that link or this one, so I just posted this one.