In the Art Gallery,is there a way to unlock more art?.I have unlocked the Ruined Citadel,but there are 4 that are locked.

When i bought it,i think it was the standard edition(don't know if there was a deluxe edition for the PC).

Does anyone have the codes to unlock these 4 artwoks?.

Or does the misiing artwork only on this Prince of Persia (PC, 2008) Special Edition bonus content disc,manuals:-


I did find this great website which shows artwork from the game.