FWIW, when I put tires on my MG, the Tire Discounters store I used didn't have a pin balancer to correctly balance the Rostyle wheels on my car. They sent me up the road to Wal-Mart where the tire and lube manager-a nice English gentleman-pefectly balanced the new tires on my Rostyles and was happy to torque them to the correct 65 ft-lbs. Tire Discounters then refunded the cost. I've heard many horror stories about balancing this style wheel(and its American equivalent, the Magnum 500), so the fact that he got it so perfect is a real testament.
Every Wal-Mart is different, but I'd let that store handle my tires any time. In fact, just about two weeks ago, I had one of the tires on the MG patched, and the same gentleman balanced the tire again after Tire Discounters patched it. Fortunately, neither cost me anything since the tires came with lifetime tread repair and Walmart did lifetime balancing.