Learn an effective way of blending multiple images.
Okay first off, you want a background to blend your picture into (background can be just a solid color if you want).
Now you're gonna need your picture that you want to blend.
Before we go any further, remember that layer modes are also an alternative. They are located in the layer palette (little drop box, default is 'normal').
Some layer modes can give you the desired effect without having to blend at all.
Here I used a 'multiply' layer mode.
Here I used a 'screen' layer mode.
Okay now crack out your eraser tool.
Set your opacity on the tool to 100%. Now, start taking out the background that is around the characters.
This time set your eraser opacity to something low. I used 20%. Now start taking out the unwanted/un-needed areas. Be careful not to take out too much and don't take out all the definite lines in the image, but you should be fading things such as the hair.
Depending on how much you want to blend, you could be done here. But i decided that i wanted to blend in those faces a little more.
So, I'd suggest going to an even lower opacity, maybe 10-15%, and fade the faces a little bit. Also take out any areas on the image you could have missed, such as the corners, or straight edges from the border of the image which you didn't erase.
I ended up with this
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