I did it for the semi. You need to ring ticketmaster and they will do it. Not sure about doing it at the ground.Got in using my 2 adult and 2 kids memberships. Does anyone know if can upgrade those kids ones to adult ones the same way you can at the ticket window for a regular season game? I know they don't check at the gate anyway, but would like to do it legit if i can.
On a side note, pretty annoyed at Ticketmaster. I got in the queue at 8.30. A friend logged in at 9 and got offered tickets before me. Now i am stuck in bloody block 303 looking into the sun!