While PSP hardware limits custom audio chants (unlike PS3), good save data will at least rename stadiums from "Stadium 1" to "Old Trafford" or "Camp Nou."
If you are playing PES 2010 on your phone or PC using the PPSSPP emulator, the process is much easier, but the file structure remains the same.
The DATA.BIN file is signed. When the game loads the file, it calculates a hash (typically an MD5 or similar proprietary algorithm) of the data payload. It compares this calculated hash against a stored hash value usually located in the header or footer of the file.
Pro Evolution Soccer (PES) 2010 on the PSP, save data typically refers to Option Files
: Correct names, logos, and kits for teams like those in the Premier League .
Running 6.60 PRO-C on PSP-3000.