Unable to upgrade to 3.03 using download in tutorial.

Hello. Modding a psp here. it is at 2.8 upgrading to 3.03 to use GTA. used the upgrade from the tutorial but i get a corrupt data error. I searched but the search engine is kinda hard to navigate.

make sure your eboot is named eboot.pbp the download has some numbers in it so u have to change that.