problem with PS1 game on psp - copyright

i ripped spyro year of the dragon off of the disk using isobuster. i then used psx to psp to convert it to a pbp file but when i press x to play the file on my psp it says THE COPYRIGHT PROTECTION INFORMATION IS INVALID. does anyone know where i can find a licence or how to solve it. i dont have custom firmware. system software version 4.05

You need to have custom firmware. To install on your psp search for pandoras battery on google.

You can only play purchased PSN games on 4.05. You'll need to install custom firware if you want to play your own rips.