Dual Screens with Nvidia 5200

According to the official specs, my video card cannot output video to two monitors at the same time. There have been many times where I would have liked to set up this feature, but could not. Over the summer I have had one monitor hooked up to my computer, while another monitor was hooked up to my brothers computer. Today is the day that I move into Vancouver, so I was messing around with the monitors to get my X.org settings ready for some monitor switching, and what do I discover? I can output to both monitors at the same time. This must have been a new feature of a recent Nvidia driver, or maybe it's doing it in error, and my video card is going to overheat and burnout. I now have about one hour to play around with Twinview, et cetera, before I have to pack up the computer and leave. Why couldn't I have discovered this at the *start* of the summer?