Remember, FlashHax exploit requires Wii version 4.3(U/E/J), the installed Internet Channel and a Internet connection to run this exploit for install The Homebrew Channel & BootMii (the exploit runs the HackMii installer)!
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Sorry for the long reply.
I managed to get the Homebrew channel on eventually using the str2hax method (Had to use my phone as a hotspot instead of the normal wifi).
Only problem is that the Homebrew channel is blank with only bubbles on screen?
Right, chrizkerr2. The Homebrew Channel still need a SD card for save and run the homebrew apps, such as FCE Ultra GX (NES emulator), VBA-GX (GB/GBC/GBA Emulator), Snes9xGX (SNES Emulator), RiiConnect24 Mail Patcher, Pimp my Wii, Wii Mod Lite, WAD Manager v1.7 [developed by Waninkoko], and other more HBC apps.
For run a homebrew app follow these steps:
1. Download and unzip the homebrew app you want. (I can't provide the link by now because I have the 'Newbie' rank)
2. Insert the SD card on your computer and copy the content of the homebrew app ('apps' folder, and other important files to run) in the root SD card. [Example: G:/] (G:/ is the SD card in the example, can vary depending on what's the name of the SD card)
3. Remove the SD card from your computer.
4. Turn off your Wii, insert the SD card on your Wii and turn it on.
5. Run the Homebrew Channel
6. Here's the app you installed! Get ready to load the homebrew app by selecting it with A button sand choosing 'Load'!