As far as i can remember from my small DX experience, the X models are based on keyframes so the blending as anibis should be in there, yes. Just get the two rotations between this and the next frame and learp them using a quaternion expressed as a function of a time. It's straight forward. [snapback]9056[/snapback]
I think that ms3d, md5 and .X file formats uses skeletal animations. 3ds, md2/md3 uses keyframe animation.