Make sure you do some research first though to make sure adding these files won't mess you PSP up more. Also, note that you do this at your own risk.
You could also try downloading the 3.90 eboot and getting the files yourself using PBP unpacker, then you would be sure of the files you were putiing in.
Also, if you visit dark-alex.org you will find the 3.90 M33-3 update, which you may wish to do.
how would the 3.90 m33-3 update help, if I can't access the game files. Because to update your psp you have to go to you game icon and go to the memery stick and click on the m33 update.
The only thing that show after I exit the recovery mode is a wallpaper and the time and battery.
I downloaded the files, and placed all the files where they were opposed to go. But, now the wallpaper doesn't show up just a white background. But with a game inside the the game or movie starts.