To make my photomontage i used two pictures that I have taken recently. One was of the town centre and one was at the skate park.
I used the picture of the town centre and added in all my other images onto it. Then, i took my other background image and put it over the top and selected an opacity of around 20%.
I liked the way that the sunset came through but it wasn't bright enough. So before I finished I selected the sky of my 2nd background at 20% and adjusted the saturation to more saturated. I then added all the layers back on and was pleased with the result.