Like I told you before Sin, it doesn't need to "support" anything. if you've noticed when you edit an SMD in MS3D ALL the frames are keyed. that means once you weight the model, animate it, and export an SMD all the frames can be SET, and the animation looks correct.. It doesn't matter if HL supports it or not. The end result= once I animate it in MS3D, EVERY FRAME is set in stone.