Unhappy [Q] help please

Ok I'm trying to figure a way to edit a .pmf file it apart of a movie scene of naruto ultimate ninja hero 3 psp iso game

Anyway I don't have a computer since last one broke and I can only use my android device nook hd+ ok I opened i so file with a file explore and I tried to edit this file but the text just dont disappear after I delete a save it reappears again

Here's a youtube vid I watched that had a fix but only for pc I'm trying to do this android style

Ok I can't post the his but please search naruto snippier ultimate ninja hero 3 startup fix that will be the vid I think its less the 2 mins

Basicly how to permentaly remove the text within the file with just android device?