all you need is a ftp sever or muiltman. next go to your computer open filezilla type your ip. now you will see multiple folders. the one you need would be dev_hdd0 click on that and it should take you to another section of folders you would need to click on the one that says game. once you click on the game folder you would have to fine your blus for example mine is BLUS31270 once you open up the folder you go to USRDIR folder once you click on that you have to look for BIN file thats name is EBOOT.BIN you are going to replace that file with the MODZ cex eboot with the original one.
if you have any questions just comment
if you have any questions just comment