Odds are if they're already smoked, they're already cooked too. Every restaurant in which I've worked we HAD to precook (smoke) the ribs. It isn't anything you can do on the fly.
You can reheat them in the oven, microwave or grill, depending on the time you allow yourself and the taste you're looking for.
Was that actually a sauce or a dry rub that was on the ribs?
Ciao,