Somebody Told Me To Press PRTSC Button to take pictures in the game but i dont know how to see the pictures that i took, plz help me!!!

First go to My Computer
Then Local Disk
Aeriagames
Shaiya
Screen shot
Then all of your screenshots should show up there.

edit: I just now saw your topic description, instead of Shaiya, you should see GrandFantasia, I would assume the rest is the same.