The first post link is from a leecher(x0Michal0x) send you to link where to get this hack , making money of surveys...check his other post.Scammer
Any way this is the real coder:
hxxp://www.youtube.com/watch?v=Kq1ap-BeMTw
and is done by client sending constant Critical Damage by Weapond not spell/skill Packet.
learn Winsock Packet Editor Pro Filter then make a VB Utility to send out.
and very possible is done in a Private Server