I'm off to work now (after all it's 7:45 in the morning here right now), but you might want to check out this tutorial:
http://www.videocopilot.net/tutorials/stabilize_shaky_footage/
In that tutorial only one point is tracked, thus only the position is stabilized... but as you can see, there's an option to track the rotation as well, by picking a second point. I'd say you just pick the two sprocket holes in the opposite corners and it should work perfectly.
If it's still unclear after that, I'll write something up tonight.