I've purchased Pocket DVD and knew that I needed MMPlayer as well as a viewer for the product. So, if you have MMPlayer, all you need is Pocket DVD.
As for MMPlayer, I think it needs a little more work for the T3. I've converted a few DVD's I have at home, and the player works well, but it lacks some of the controls (or else I don't understand its use). I can't stop a movie and then return to the same location, I can't use the slider to move to another location or skip a scene, and I have the occasional "crash / Fatal Exception" when changing screen size and rotation.
But, for trips, I look forward to taking a couple of my DVD's on the plane and watching them while traveling.
fnagle