as you said, you have droped those files into your system folder.In game, target a mob and on the left hand side there's an arrow(press it).When you press that arrow it will logically show you the race of the mob, the resistance,etc...but it will have 2 more options the 1st is for the drop(of the mob targeted) and the 2nd for the spoil(of the mob targeted)ohh, dont forget to x the rate of an item with the rate of drops on the server that you play, cuz on the default rate that is shown,you are shown the official rates(x1)(eg: Animal Bones 5%(official rate)...Server that you play 5x(drop rate) so 5%*5=25% for the animal bones)