put the file in a zip file, real easy, that's how I did it. You could change the file extension, it's just going to change a few bits, and then your computer has a catalogue of files that go to what program it's not actually modifying the integral data.
But yes, magnetic, crystaline copper, spoons. Shaped into a golem.
Not as bad as the time I gave our party's tank (Massive Iguana, Pathfinder) a few gold to buy some drink, doing the math he somehow magically came back with some 40'000 pounds of weak alcohol.