Is Resident Evil 5 the version of the game you're playing? If so, I might be able to help you out with that.
Trophies stack. All you need to do is play it on Professional and you will unlock the Veteran trophy as well.
I did my first playthrough on Normal and unlocked both the trophies for Amature and Normal.
I'm looking for Friends to Play RE6, RE5, and Operation Racoon City add me!! "Nemodo"