mem card hacking... crc protection field?
first, i'm glad that there is actually a forum on this topic.
i've been hacking game saves for years on other consoles, and only recently did i finally get a mem card hardware to back up my ps2 games. the first game save i tried to hack was my ffx and ffx-2 games. i've already finished both of them some time ago, but thought it'd be fun to get the items/accessories in abundance. i got some item and other codes from the normal places and started looking around the gamesave file until i found where these were stored. i, then, simply changed the item codes to have something different, and changed money values, etc. the problem is that when you try to load the gamesave with the game it says that the save is corrupted. this leads me to believe that there may be some sort of checksum field or something to try and protect the save.
does anyone know about this, if this is truly the case? or is there some other known thing about ps2 saves that i may simply not be aware of.