Things You'll Need
Instructions
Download the USB Loader GX files from the USB Loader GX website.
Insert the SD memory card that contains the Homebrew Channel files used on your Wii into your computer. Extract the USB Loader GX files into the directory "SD:/apps/usbloader_gx" and remove the memory card.
Put the memory card back into the front card reader slot on the Wii and open the Homebrew Channel from the Wii main menu.
Locate the USB Loader GX program from the list and press "A" to run it. The program is now installed on your Nintendo Wii 4.3.