First off I'd like to say; I made this as a PSD File so that anyone using photoshop or the likes can open it up and have the crest in layers so they can easier color and design the crest.
If you do not have any program that can open it then just:
1) Copy, paste.
2) Right-click, save.
3) Right-click, open image in new window, save.
Now then, to go about filling this out. First you should come up with the meaning of a crest that best reflects your Hunter. Then design it. Off to the side say something about why you chose what you did and maybe throw in some doodles there. Have some fun!