Question: are smoked ribs already cooked?
Answer: Even though the ribs are not fully cooked, they're most likey very close so they don't need too much more cooking. If you prefer your ribs to be 'fall off the bone' (which in BBQ circles means they're overdone) you can always wrap them in foil and either cook them in the oven at 350 or indirect in foil on a grill.