Welcome to DC tyzorg...
Spare ribs need to cook low (temperature) and slow (long periods of time)
Preferably do not cut them into individual ribs until after they are done also.
At the point you are right now, I would suggest you wrap the ribs in foil...Turn your oven down to 200* or less, and forget about them for a couple of hours. Check for tenderness/doneness. Baste with your favorite sauce...and run them back in the oven for 10 minutes. Hope this will help you enjoy these ribs.
Be sure to read the BBQ forums here on DC for BBQing ideas for next time you want to cook spare ribs
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