Okay, I apparently did the same thing as Jeff above. When I opened the case, the plastic front came off cleanly, but now I can't figure out how to pry the innards out of the metal casing, which apparently was supposed to just happen by itself, according to the instructions above.

I've tried very gingerly pulling and prying around the edges to see if I can dislodge the metal casing, but no such luck so far. Now what?