1. Choose a suitable image or photo.
2. once the image has been opened choose a suitable image size. (menu image-image size). Around 200-400 pixs height - (width will adjust itself) is suitable on a 17" screen.
3. Ok so far- duplicate a copy(menu image-duplicate)
4. choose clone tool and and clone (alt click)
5. release click and reproduce clone effect where you would like it to end up.
(note this requires practice and a steady eye for colour)
youll crack it in no time. this pic took me 5 mins.
good luck!.