Open photoshop, then open a new canvas (if you go for a sig, try about 400x150 pixels)
Open your image, go to the selection tool (the square thing in the upper left hand corner)
Then you should see a box that says feather toward the top and 0 px inside the feathering box. Put in an amount (I usually use about 30) and select the part of the image you want. The dotted square should turn into a circle like shape. Then go to edit, cut, and paste it onto your empty canvas. The edges should be faded. You can do that with multiple images and place them on the same canvas and they'll look blended together.
Use the move tool (the arrow with the 4 mini arrows attached to it next to the selection tool) to move particular images around to your liking. Select different layers to edit particular images on the canvas.