Finally, I can get to publish my original idea for this challenge. I like this not because it's a sooo great idea but because I was trying too many things for the first time and this has been a long but great experience.
I was trying the slider & it did work. My original plan couldn't work (wanted the image to fill the whole screen but the layer images kept covering the slider) so I changed it.
I was also using slide layers for the first time, it looks like a good alternative to creating multiple slides.
I was also trying the variables - especially to select the image and to display your chosen background. Thanks to Tim Slade and his great help in achieving this!
Demo:
http://j.mp/blurred_backgroundFeedback welcome guys!
BTW, really enjoyed all entries and ideas so far :)