I have a 4.1U Wii.
With the xxyz guide, I managed to upgrade it to 4.2U by installing some wads files.
When it got 4.2U, I installed HBC, DVDX and BootMii as IOS (the HackMii installer said that it can only install BootMii as IOS)
Then I made a NAND Backup , then apply the trucha bug, stub removal,
Then I installed some IOS : 202, 222 ,223 and 249-v14, 249-v15, 250-v14, 250-v15
Then I installed the PriiLoader, apply some hack : disable online update, disable disc update, region free
After that, I installed NeoGamma r8 beta 15, but when I load the Cooking Mama - World Kitchen disc from the NeoGamma, it said DVD Read Error 1048
Can I just restore NAND to make it back before messing up with the IOS ? Does it harm ?
I don't have USB so I cannot test over USB