For those of you who follow this guide, I would like you to know that I have added another layer of protection to the guide. In chapter 2 during batch wad install, the first wad to install will be "!!!IOS60-system-compatibility-test.wad". This is ios60-v6174 installed in ios slot 236, after install MMM will reload to iso236 (ios60-v6174) and install 1OS236.wad. 1OS236 is ios36 patched to slot 236, after it is install MMM will reload ios236 again. What this does is test ios60-v6174 for system functionality before proceeding with the system modification. It is extremely unlikely that this will ever serve any purpose, however it is possible that Nintendo could produce new wii hardware in the future that would not be compatible with ios60-v6174. If that where the case, the installation would freeze at !!!IOS60-system-compatibility-test.wad and prevent further modification to the wii, preventing damage to such a system.
A similar situation happened in the past with softmods using ios30-v1040, this protection will prevent such an issue from happening with ios60-v6174.
This is not an update for your softmod, just a change in the modding process.