Developing Interactive Kiosk That Needs Two Separate Displays?

I need to create a game for an interactive kiosk. The game is fairly basic, it will most likely be done in flash/AS3 (I believe this is the best choice for this kind of game) UNLESS the dual display requirement is far easier to accomplish with a different technology. The kiosk consists of two displays, both of which need to show separate content from within the same game. Here's the question: How can I (or anyone) create a flash game that utilizes two separate displays for different content? (This is not just a wider field of vision for the game, the two screens will show different things.)

My Idea (probably not the best):
Design the game on a canvas twice as wide as one of the monitors, then split the canvas in half and code the game to output different things to each half of the screen. Then run the monitors in "extended desktop" mode or something like that, and make sure that the split between the two desktops occurs in the middle of the game canvas. The two displays are being fed from the same machine and same graphics adapter. The whole "kiosk" is powered by one single machine.