Game Info Editor
In addition to an update to Extended Pandora Menu, developer Hellcat has released Savegame Deemer, a custom firmware plugin for the PSP that allows users to easily save and load decrypted savedata from specific UMD titles. Once decrypted, savedata can then be modified directly in any standard hex editor.
The author points out that the load decrypted savedata function may not work with every UMD title, due to internal checksum checks.
Download Savegame Deemer