Hello guys,  I am playing with an older client version, 5017 more exactly and I would like to add some new GUI buttons with simple functions like opening a NPC dialog or something like that not very complicated, i started searching the entire client structure but all i found out is that Buttons coords  / size are displayed in GUI.ini , their graphics are in Ani / Control.Ani but i am not able how to figure it out the remaining parts. If some of you did something similar could give me some advices?  Thanks in advance.