The GPT fix was something that he mentioned to me before he went missing. I haven't had any replies since the end of August.
I think the reason Cyan hasn't added it is because most of the code is old and a little convoluted.
I'll look into what can be done, but I doubt anything will come of it. For your setup you're probably better off using WiiFlow Lite.
My mod? You just need to copy it to your SD card.
Sorry haven't touched the Wii in over a year. Last i remember i needed the wad version to install it on the wii dashboard. Otherwise you gotta go to the homebrew channel.
Unless there is another way to put it on the dashboard.