No. The Hitachi drives do NOT use Activate.iso for anything. Either the Drive is not hitachi or you're using the disk without needing to.
I queue in this discussion becouse I have a similar problem:
i spoofed a liteon 93450c over an hitachi 3120L v47, and this last one just boots me some games and other does not (ie. boots fifa south africa, and doesn't boot fifa 11). When it doesn't boot it doesn't show the "normal" play dvd screen, instead it forces me to open tray.
Anyone knows what could it be?