Let me try to help clear up some confusion.
I had trouble making this work, but then I realized it was because the instructions were a little hard to understand.
I have Windows 7 64 bit.
Here's what I did to make it work:
1) Open NAGC.exe(the hack) in your GrandChase folder.
2) Browse to your GrandChase directory and click save.
3) Open your GrandChase patcher, and when it reaches 100%, click "Apply" on the hack window.
4) At the login screen, use Unlocker to unlock Ai.kom. Make sure you click "Unlock all".
5) Click "Remove" on the hack window.
6) Log in, choose any server, make a dungeon room.
7) Start the game, and press RIGHT SHIFT + F1 at 95% loading to activate the hack.
8) After the boss dies, press RIGHT SHIFT + F2.