HOW TO INSTALL:
1: make sure the eboot & prx's are in:
ms0:psp/game/Project4
2: make sure you've made room for the installer by deleting Flash0:/Dic (you don't need it)
3: Use Filer (1.5 kernel) to backup flash0 and flash1
4: WAIT! The LED won`t flash much and successful installs have taken me 15-20 min
5: If you get a message saying failed writing:
enter recovery mode, enable usb,  copy filer's eboot to psp/game/recovery,  set kernel to 1.5, run program at recovery,  and restore flash
6: Rinse, repeat

It's just like a filemanager
All of the GAMES,ISO,MUSIC,PHOTO have to choose a file name open it manually by pressing L button then selecting.