If your apple store has available ram, they will install the ram at the store, on the spot. It may take awhile but your problem will be solved. 🙂
hope this helps.
I upgraded the ram on my last macbook. It cost more at the store because they pull out two 1GB sticks and insert 2 2GB sticks. Then they give you the 2 1GB sticks to take with you. When you order they just build it with the 2's. Cheaper. I just ordered one also and had them add the ram this time.