Is there a detailed, step-by-step guide about how to install Haxchi on a 5.5.1 FW Wii U? I know I need to buy an exploitable DS game from the eshop, and the only way to do that without updating to 5.5.2 is via NNU Patcher... But I'm not familiar with NNU Patcher at all. The 5.5.1 FW Wii U I'd like to install Haxchi on is currently 100% unhacked. Thanks in advance for any helpful advice.