You're still confused.
Download Zelda through Wii U USB Helper without the DLC.
Install what you downloaded with WUP Installer.
Then open the game and play.
If you want to get the DLC that you paid for just open eshop and download the DLC the normal way.
If you want to download DLC through Wii U USB Helper you'll need a CFW. Mocha will do. It's suppose to go to your system menu when you launch it. After going back to system menu you're now in CFW.
Download Zelda through Wii U USB Helper without the DLC.
Install what you downloaded with WUP Installer.
Then open the game and play.
If you want to get the DLC that you paid for just open eshop and download the DLC the normal way.
If you want to download DLC through Wii U USB Helper you'll need a CFW. Mocha will do. It's suppose to go to your system menu when you launch it. After going back to system menu you're now in CFW.