Oh, man. Not another one of these: i.e., a movie that sounds cool that nobody figures out. There was one a few years ago on the HTF where the poster remembered a movie where people were looking for treasure using a map marked in footsteps, and it wasn't working out until they realized the people who used the map were much smaller or taller, and thus had much different strides.
Maybe both will turn out to be The Secret of the Incas.
From reading the user comments on the IMDb, it sounds like this is the map room movie.