I went through the whole Wii U Guide (except vWii). It all worked as indicated there, except I had to replace homebrewlauncher.rpx with homebrewlauncher.elf. It just wouldn't work with the .rpx file (I tried several sources). I think I may have replaced it with version 1.2, though when I start the Homebrew Launcher it still says it's version 2.1. After I'd replaced homebrewlauncher.rpx, I could finally launch the Homebrew Launcher from the loadiine.ovh website. However, it would still only work with version 1.3, not 1.4. The Wii U guide actually says that this may be the case, so I just used 1.3. I then finished the whole guide, so I now have the Homebrew Launcher as a channel on my Wii U's desktop (I used Coldboot Haxchi with a hackable Virtual Console DS game). Now I can play games installed with WUP-installer, but Loadiine does not work. When I start it, it always just gives me a black screen. I suspect it may have to do with the fact that Loadiine-ready games use the .rpx file extension: perhaps my Homebrew Launcher cannot read those files? But that would mean I'd have to undo the whole Wii U Guide and then go through it all again. I'm hoping this won't be necessary.