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Original Photo

Background

De-saturate the photo. Change the levels so the range is closer. (Basically slide the black and white sliders towards the gray slider.)

Create a new layer. Fill it with #fb4700. Set blending mode to Hard Light.

Person

Duplicate the photo. Take out the background by either the selection tool.
Create a new layer. On that new layer, take the character, and paint the person black where you want it black.
Set the person layer to blending mode overlay. This will have the part that is not black come through to reflect that red and orange colors.

Graffiti

Create new layer just below the layer with the solid color set to hard light. Take a black grunge brush and start grunging the layer. Then again add grunge with the color set to white. Take the eraser tool and take a grunge brush. You can then delete some of the grunge on the layer.
Create new layer above all. Set the foreground color to #e6ff8e. Grunge this layer a little. Use it for accents.

Final Result

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Another Example

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Discuss the Adobe Photoshop tutorials on the forums. You can find the photoshop files to download there too.