The only easy way is to have an experienced taxidermist do it. The fastest way to do it yourself would be to simmer it slowly, taking it out occasionally to pick off the meat until it is clean. Your right, boiling can damage the bone strucure. Do this OUTSIDE! There is no chemical to remove the meat, though adding some washing soda while simmering will help break down the meat and fat some. You can also soak the skull in a container of water, seal it, and let soak for a couple of weeks in the warmer months. Take it out and spray off as much meat as possible using a garden hose. Place the skull back into some fresh water and repeat the process until clean. I would not recommend this method unless you have a very strong stomach and understanding neighbors. After a couple of skulls, I started understanding why taxidemists charge what they do for a European mount.