What are you having a problem with?
Download version 0.1Beta2 and put the files in the correct folders on the SD card. Next you have to download the HBC installer (boot.elf or boot.dol, I don't remember) and place it on the root of the SD card. Then, go into Wii and copy the save file from the SD card onto your system. Just run Twilight Hack and you're good to go. It will install it.
Still having trouble?
Make sure your SD card is formatted with the FAT file system.
Make sure you're using the correct save slot:
--Look on your Twilight Princess disk on the bottom, check the inner ring. There will be a serial number. If it is...
-RVL-RZDE-0A-0 USA then use the "TwilightHack0" save slot in the game.
-RVL-RZDE-0A-2 USA then use the "TwilightHack2" save slot in the game.
MAKE SURE that you use the Twilight Hack right after you copy it onto the Wii system. This version deletes itself when you reboot/restart/etc the Wii system.