sorry for my bad english..
So, to have the G15 keybaord working on Archlord, you have to :
start the webzen launcher
Select your country
kill the logitech process called:
LGDCore.exe
LGDevAgt.exe
Launch again the logitech G serie profiler
Keyboard is working XD
I m under seven 64 bit and have the G110 keyboard
Logitech G serie key profiler is v3.04.143
Have fun with macro