Download [v2.0] PSCRYPTER add it to your PsP game Folder.
Add and Eboot.PBP to the folder name sign on the [v2.0] PSCRYPTE folder.
Go to the Memorystick on your psp and look for PSCRYPTE launch it.
PSCRYPTE will Start working,if everything goes ok at the end you'll get a message,(Hope it works!!)
if you don't get the message and instead you get random error that says -1(sorry its not compatible)
Erase all files from folder name sign in [v2.0] PSCRYPTE folder And try Another homebrew file.
Hope this help for some.