Gaming PKJi PS1 games nonplayable on actual psp

[Demix]

So I downloaded for a bugs life for example, Vita shell epsp, game, copied that folder to my actual psp. The game shows with like PS3 on in red letters and game failed to start. Now I have downloaded other games with this red lettering before and same problem, not sure why if if has the eboot file

 

[i-snake-z]

Hi,

On your psp you have to install a plugin named npdrm_free.prx.

I think it will resolve the problem.