The Meat Hooks mod for 1.6.4 changes the way you get meat by adding butcher tools to the game. Instead of getting meat directly from killing animals, you will get their carcasses upon death. You can then hang them up, skin them, butcher them, smoke them, and cook them.
You must then hang the dead animal on a meat hook and use a filet knife to skin them then use a cleaver to obtain the meat.
The meat must then be preserved by either freezing it or smoking it.
Ice blocks must be directly touching the meat and the lava can be up to 5 blocks below it to prevent it from rotting.
You can cook the animals on a spit over a fire.