Yesterday, I bought the standard edition of the prepurchase. When I got my code, the instructions were very unclear as how to use it. So, I called customer service and got a very helpful person on the line. To use your expansion code, log into myaccount.turbine.com, just like it tells you. Then, click change billing options. Select enter game time card code. Put your expansion code into the box that pops up. This *should* apply the expansion to your account. If it doesn't, keep putting the code in, and it will eventually work, as I was told by the customer service representative. It worked first try for my dad, but I was already on the phone with customer service, so they manually added the service to my account. All said, its probably easier to just keep entering the code than to call customer service, as I was on hold for close to an hour.