Parboiling means boiling them in water for at least a half hour in a big pot with 1 or 2 onions. It makes the meat so tender it falls off the bone.
A quick and easy sauce is made with ketchup, brown sugar, salt n pepper and Lee & Perrins worstershire sauce.
You really dont want ribs where the meat falls off the bone.
It should be tender but with a little bite to em.
Falling off the bone means you've over cooked em.