Neat trick in Elements

I was fiddling around in Photoshop Elements, trying to figure out how people get the neat edges on their photos, where it's just slightly darker in the corners or on the edges. I found a place online that told me how to do it, and once I figured it out, I started messing with some of my wedding photos. This is what became of my playing, and I thought it looked so great that I thought I would share it with all of you. I hope you don't mind the blast to the past & just enjoy the fact that I have conquered another aspect of Elements. I'm pretty pleased!