To make this senser and image just follow this simple step:
1.Upload a picture of u and your friends and put inside the photoshop cs3.
2.Click at the lasso tool and draw a circle on your face.
3.Than click at filter,click pixelate and click at mosaic.
4.After clicking mosaic click at cell size 25 square then press OK.
5.Then do the same thing in your friends face.
6.Then save it.