Blender -> Irrlicht animation

Hi, I’ve imported an irrlicht mesh to blender, to learn what kind of animation could have a blender mesh to export to that engine.
Now I’ve an example Irrlicht’s animated mesh on blender but I don’t understand how it moves… I didn’t see any IPO.
Can anyone take a look to this mesh? The blender file is here:

Vertex keys, thousands of them!

Look at Mesh >> Key >> KeyIpo.