You dont do it at the ticket booth, but you can take it to the customer service windows and they'll set it all up for you there, then you'll take what they give you to the ticket booth and they'll give you paper tickets and you go to the enterance gate. Then you have to go to the AP processing and they'll take your picture.
Of course you could just go to the ticket booth, get your tickets and then go to AP processing to upgrade, but our upgrade was a bit complicated so thats why we did it at costomer service. It actually took like 45 minutes to do all 4 of ours at customer service.