Remove and replace heads in Photoshop

Photoshop Changing Face

Adobe Photoshop - Extract / Change background

For extracting someone or an object from the original background you can use (Magic Wand Tool, Filter Extract, Lasso Tool, Magnetic Lasso Tool, Pen Tool) and there are a lot of ways to do this procedure.

how to change the backround in photoshop

How to extract someone from an image with PsCS3

Learn how to change the background of a photo in Photoshop in 90 seconds...

How to Combine 2 Images Seamlessly in Photoshop

Photoshop tutorial: making text photo with Angelina Jolie's head-shot