Irrlicht Engine

I have 3 animations I want to put in.
idle, walk, run.

On all 3 of the models on still.

scene::IAnimatedMeshSceneNode* anms = smgr->addAnimatedMeshSceneNode(smgr->getMesh("../../media/run.3ds"));

this is what I use to load it.

I don't think animations in 3ds are supported...

Apparently .x animations are supported. Also md2.

That is, if you can find an exporter that works.

MD2 works nicely especially if you're using Milkshape. If you're using 3DS Max you can use the Pandasoft .X exporter.