Just get an emulator so you can play PSX games on PSP, this is not much consistency as Posploader but it is a homebrew which allows playing PSX on PSP-3000.
Big news, is not ISO Loader, but it is an emulator for the PSX games, unfortunately does not work 100%, but has some compatibility with various games from Playstation 1. This emulator can be used by the Dave HEN in PSP-3000. To use this emulator in the PSP-3000 you must first put the PSP with ChickHen.
Download: http://download830.mediafire.com/mzy...uiy1nl/PSP.rar
PS: This wont let you put CFW on your psp.