I've been using Photoshop Elements for almost two years now. During that time, I've focused primarily on learning how to tweak exposure, etc, on my photos and on learning how to use artistic effects to transform some photos into digital art pieces. I've been wanting to delve into using Photoshop layers to combine multiple images. Some recent posts by ombra, rottlady and A. Mac encouraged me to give it a try.
For better or worse, here are some of my results along with the original images. These were all created by copying a second image on top of a background layer. The transparency of the top layer was then set so that some of the background shows through. Various effects were applied to the individual layers and to the combined image.