Can someone please tell me how too take say a photo of a friend and put it on a funny body?:) I've been trying to figure out how to add to photo's together forever hehe. I can't seem to find it in the manuel or a site to help. Thank you :D

You'll need to learn about:
- layers
- making selections from one image and pasting it as a new layer on another image
- moving and resizing

Get yourself a good Photoshop Intro book, there are tons of them.
Here's a free tutorial similar to what you want to do: http://www.photoshopcafe.com/tutorials/paste_into/pasteinto.htm