I just reinstalled "d2xv10-beta53-alt-vWii" as described in the guide again (Installing cIOS 249, 250 and 251, step 4).
Same result as before. Selecting cIOS 251 I come back to the vWii when trying to launch the game.
What can be wrong? The Homebrew Chanel? The forwarder to USB Loader GX? USB...