Step 1: The Picture We Will Be Modifying
When I modify the avatar I like to use this picture.It is simple,and i do not have to worry about colors.
Step 2: Open the Avatar Into MS Paint or Other Editing Program
Step 3: Erase Box Containing Kiteman
Now we will have some space to mess around
Step 4: Erase Arm Lines
Now you can edit the arm.
Step 5: Edit Hair
I like to use Goodheart's idea of shortening every second hair.
Step 6: Add Arms
Whatever position you want,or just redraw the lines on his shirt.
Step 7: Add Eyes
Step 8: Edit Shirt Desighn and Mouth/Nose
Step 9: Add Facial Hair and Other Oddities