Photoshop help! please, 10 points?

[Some one]

I've seen some ppl edit their picture like one place but 2 same person.
they said they've used photoshop.
I dun really know how to explain this. but if u understand please help me. How do you do this?

[SkadaSnafu]

So, what you are saying is that there are 2 of the same person in the same picture. The way to do this is to take a picture, erase everything around the person and copy this picture, create another layer on top, and paste the other person like a clone. Then you can move the person around, and place the original as the background. Or, you can take pictures of the same person in different poses, then erase the background to the person in each of the photos and then place these people in different layers saving one picture with the background as the base picture.

Hopefully you can see the picture below where I cloned a person and placed them all over the picture. Is this what you mean?