The way most programs (including usb loader gx) change the ID, they are only changing the Id of the game, not the save data. You need to edit the partition.bin stuff. Get your meathooks on this... gbatemp.net/index.php?showtopic=128215 or even easier is TheGHOSTWiiIsoTool.exe. The first is a tool made by dack which can change a whole bunch of useful stuff. The second is a tool written for making GH3/A custom discs and at the very bottom it says "thanks to dack...blablabla" so both methods are gonna end up doing the same thing. The second (and much easier) is only for GH custom games though.