You could create a ring of fire setup. Roll the ribs and secure with a skewer, placing them in the middle of the grill on their bone-end side. That should keep them pretty clear of danger.
Otherwise, you could pile coals on one side and start a small number of coals on top or to one side of the pile. Put an aluminum roasting pan on the other side of the charcoal grate and keep the ribs on that side. You may have to add coals after a bit, but it should work fine as well. Rolling them would also be a good idea to keep them compact.
Cat Daddy's BBQ : 22.5 WSM / PBC / Weber OTG 22.5 Cajun Bandit / Smokey Joe Gold