Priiloader is a modification of Preloader, and it states on the DOP-IOS Wiibrew page that if IOS60 is DOPed, Preloader must be reinstalled to make sure the System Menu works again, so clearly DOP-IOS makes some potentially dangerous changes.
I have system menu 4.1U (USA), which uses IOS60.
Has anyone ever tried using DOP-IOS (all patches) on IOS60 with Priiloader installed while on System Menu 4.1U?
I'm sure someone has, and if they did, they probably posted directly afterwards in the Bricked Issues section. Messing with IOS60 will invaliadate your Priiloader install and probably will give you a System corruption message.
Not really doing much Wii stuff these days.