I hacked mine myself
You don't even need sigpatches if you want to launch hbl from NAND.
But you will lose ALL preinstalled demos if you do so..
- download the dev menu (menu changer) from the developer portal. I can tell you which one to get after work.
- flash an SD card of at least 2GB with the .ddi file provided by the menu changer. After work I can also tell you which tool is recommended to use
- insert the SD Card into your Wii U and hold Power + Eject until the LED turns orange
- navigate through the menu to install the menu on the SD card
- once it's complete eject the sd card and turn on the system. you should now land in a retail-like menu.
- you can now follow this guide to install hbl:
- as said before Kiosk units don't require sigpatches to run HBL and games installed on NAND
- If you want to run demos on NAND from a different region follow this guide: (type 119, NOT 199)
NOTE: YOU CAN'T RUN RETAIL GAMES ON IT. I yet have to test if it's possible to launch decrypted retail games re-encrypt with the dev common key on these systems