I think I managed to grab the Immaculate Helmet, and carry it around for awhile, and then dropped it somewhere, all before realizing its importance. Whoops! I have spent awhile searching for it, and when I used the lakehouse door, it does not reset the helmet back to where you find it. Anyone have the ID#? Can it be accessed through command code? If not I'm going to play an older saved game from before the Forgotten City and replay it all, it's good stuff anyways.