Well, it's not setting it right now. I've got it copying the value of a state field in my custom record to a customer record's addressbook, but it keeps coming through null no matter what is in the custom record's state field, so I think it must be an invalid value somehow. I'll try figuring out exactly what it's trying to set the customer addressbook value to, and if that doesn't fix it, I'll try without state and see if zipcode auto-populates it. Thanks!