Sorry, I didn't put my full specs....
My system is:
Wii PAL 4.2E
Wiikey v1 flashed with firmware 1.9s
I had to follow A,B,C step from the guide mentioned before to get NeoGamma R8 beta 7 working for me. After that I have NeoGamma working. And I am able to run NSMB from DVD now. So it's runnig...