1. pick out the picture you want to make a zombie
2. create a new layer
3. pick out a light gray color
4. paint over the skin parts
5. click layer, go to blending options and choose the blending mode that you like best
6. merge the skin and the picture together
7. burn around the eyes, mouth, cheeks, and nose
8. get the gray color you used from before and paint over the eyes (tip: set the hardness to 0%)
9.  go to filter, gaucasion filter 
10. you want it to be around 2-5 pixels
11. go to the blend options and choose what looks good to you
12. erase anything that is not in the eye
13. change the opacity to low and play with the blending options again
14. create a new layer and name it "Blood"
15. select a dark red color and color the bottom of the eyes
16. go to blend mode and make it soft light
17. make blood layer under the layer with the eyes
18. go to filter, gacasian blur
19. the pixels should be 10-13
20. merge the blood, eye, and image together
21. use the burn tool again and burn around the eyes
22. pick a picture to texture the face
23. copy it, paste it, and change the opacity
24. you need to erase anything you don't want
25. raise the opacity
26. go to the blend options and change it to how you like it
27. burn the parts that you want to burn