As the title states, I was attempting to install USB Loader. Step one on the guide I was using was to downgrade to IOS36-64-v1042.wad. I did this......and now nothing works, any thing I try to launch goes to a black screen! I am on 4.1U. Will updating to 4.2 fix this and allow me to start over? Or will it simply brick my system? Can I use my legit copy of NSMB to sstem update to 4.1? And that fix the downgraded IOS? I hope I have not semi-bricked my system... I have a NAND backup made with BootMii.... I do not have PriiLoader installed.