Even easier and said to be the equal of what is prepared in Hawaii:
Submitted by: KIKUCHAN
Rated: 5 out of 5 by 422 members Prep Time: 10 Minutes
Cook Time: 20 Hours Ready In: 20 Hours 10 Minutes
Yields: 12 servings

"Slow-cooker pork butt roast with delicious smoky taste."
1 (6 pound) pork butt roast
1 1/2 tablespoons Hawaiian
sea salt 1 tablespoon liquid smoke

1. Pierce pork all over with a carving fork. Rub salt then liquid smoke over meat. Place roast in a slow cooker.
2. Cover, and cook on Low for 16 to 20 hours, turning once during cooking time.
3. Remove meat from slow cooker, and shred, adding drippings as needed to moisten.
ALL RIGHTS RESERVED 2008 Allrecipes.com Printed from Allrecipes.com 8/8/2008

It's not pibil, but it's delicious.