I'm interested in trying to hex edit PSP saves on my computer. I've copied the files found in the saves folder on my memory stick onto my PC, but when I open the .SYS file in a hex editor, I can't make any sense of it. Does anyone know of anyone having any success with this? I don't have my PSP modified in any way, nor do I intend to. I just want to edit the save file.
When I do a google search, all I find is info on hacking the PSP firmware and occasional info on apps that run ON a hacked PSP to edit saves.
Why would I want to hex edit saves on the PSP when I can do it on my PC?
I know, you're probably thinking "Seriously? It's been out for a week!"
But I don't intend on cheating in my live game at this point, until after I beat the game. Just want to do it to say I can do it(and hopefully have a reference for future PSP games).
Given that the saves are directly accessible to the PC via USB connection, I figured it might be easier for PSP games. I was quite wrong.
After doing some research, I found that while the PARAM.SFO file is in all PSP saves, the other file has varying extensions(.SYS for FFT:TWOTL, .BIN for another game I checked). The PARAM.SFO file just seems to reference the other file. I'm assuming the other file is where the actual save data is held.
The variable extensions on the second file would suggest that different games use totally different ways of storing and compressing the information. Furthermore, from my experience with PS2 saves, I'm guessing that each game uses its own Checksum.
Doing some googling, it appears no one has ever tried PSP save editing before, which I find astonishing.
Anyway, given the complexity, I'm going to view this as a lost cause at this point. If anyone is up for the challenge and gets anywhere, let me know.
