A photo is definitely not the same.
If you're currently in France or Spain, just go to the ticket office.
If you're still at home: I see you're from Germany. Deutsche Bahn can also book this reservation, either at a ticket office or via phone (030 5512 should get you to the international service directly, or otherwise use the general number 030 2970; collection via a DB ticket machine should be possible).
Sometimes, DB staff say they can't make a reservation for this train but they definitely can, as long as there are still seats for pass holders available. You may need to insist (friendly of course) that they can really do it. Others passengers succeeded in buying it from DB before :)
(Hints: they need to go via direct reservation (Direktreservierung / manuelle Eingabe), enter the train number, tariff code 44 (TC44) and the class as T, C or P (not as 1 or 2). T is equivalent to 2nd class.)