Pour the can of beef broth into slow cooker and add boneless pork ribs. Cook on high heat for 4 to 8 hours, or until meat shreds easily. (I cook 8 hrs, because I put it on before work, even w/ frozen pork and it's done when I get home).
Remove meat from liquid. (I save the liquid for my homemade vegetable soup and put it in a bowl in the freezer) Using two forks, pull meat apart to shred it. It may not seem like it's working right away, but keep working at it and it will.
Stir in the entire bottle of your favorite barbecue sauce (I use sweet, but use whatever is your favorite). Cover and cook on high for another 30 minutes or until completely heated through. Fill hamburger buns.