Jojeff's Photo Merge Scene Cleaner
To take a photo like this, you need to have a background that doesn't move and then have your model move around. You have make sure that your model keeps in mind that they have to make sure that they don't overlap with the other photos. Making this type of photo is so much easier. You'll need Photoshop Elements 11, 12, 13, or 14 doesn't really matter. Look for the Photomerge Tool, then select the Photomerge SceneCleaner. This is under the Enhance section, but on Photoshop Elements 14 it was moved to be under Guided. Then Select your photos. Afterwards, it will give you a pencil and an eraser tool. The pencil tool is for highlighting items for a photo, to be transferred to another photo. Once you're done, you can save it. You'll have to save it as a .jpg file, so you can use the photo.
Some photo's I used: