To use a "linked" save file (such as a 100% unlocked option file or updated rosters): How to Transfer Save Data from PSP to PPSSPP
When a user searches for this link, they are typically looking for a specific file structure, usually contained within a folder named ULES00231 (or a regional equivalent like ULUS10059 ).
While there isn't a specific published "essay" dedicated solely to the save data link of Pro Evolution Soccer 5
: Check their "Saves" section, as they often host legacy .bin or folder-based save data for various regions.