You will need:
*Cracks brush set
*Blood brush set
*Large, well aligned photo of someone's face
*A computer (duh!)
For extra credit steps you'll need:
*Windows XP,Vista, or 7
Step 1: Download & Install Gimp and Brushes
Download blood brushes here .
Download cracks brushes here .
Install Gimp.( Refer to photos.)
Install brushes by copying them and pasting them to your gimp brushes folder. It may be different on your computer, but on mine it was located in C:/Program Files/Gimp 2.0/share/gimp/2.0/brushes. For more information on installing gimp brushes, do a quick Google search or visit here . Also, refer to the pictures for help.