Ya your problem is that the tut your looking at was made by someone useing NTSC version of that game and the NETGUI_NA.ELF the NA stands for North America replace the NETGUI_EU.ELF well anyways i'm pretty sure thats your problem
When i go to online mode the usb drive read but not mcboot start.
I think that i have all the files in my usb stick.
That doesn´t matter if you have all files in USB.
With the Game-swap-trick uLE must come up, if you have plugged in your USB or not.
And then you choose in uLE to start the installer over USB.....