Skin the head, remove the eyeballs andbottom jaw, and boil it in a mixture of water and borax (soap powder detergent available at most Wal-Mart's), being careful to NOT SUBMERGE THE ANTLERS - they will discolor.

Using fingers/pliers/screwdrivers/knives/etc., dig out the meat, skin off the gristle, pay close attention to the sinus cavities and underside of the skull. Most of the funky stuff is in those areas.

TIP: You can use an electric turkey roaster to boil the head. Fill with water, Borax and crank it up.
Huge TIP: DO NOT tell your mother/wife/fiancee/gf that you're using her good turkey roaster to boil dead animal heads. Women get funny about that stuff, so spare yourself the drama.
UsefulTIP: mush up the brain with a screwdriver, and use a hose to blow it out.
Biggest TIP: Point skull AWAY FROM FACE while hosing out the boiled brain matter. I learned the hard way. That stuff might be a delicacy in some countries, but where I come from, it tastes like... well.. you can imagine.

Whole process is absolutely filthy and takes at least 4-6 hours. The less impatient you are, the easier it is - give it a good,long time to simmer.

After it dries, I'd recommend taping off the antlers, and spraypainting the skull white.

It's cheap and it looks awesome when it's finished, but if you have a weak stomach, don't even try it.

Option #2 - find someone with some hungry dermestid beetles, and send it to them.