Hey man, try using Dean`s ebootFIX tool instead then replace everything from the "retail" folder with each game, not "npdrm". Not sure if it will work, but you can try. Please report back after you have tried it man.
all games are working well now. have recopied them and put them through deans ebootfix tool and copied the created file to original back ups. copied the created files one by one rather than overwriting folders and both games are working.