Importing Issues

Well here’s the thing, I’ve got some models from Forza 3, and I’m having a bit of trouble importing it to blender.
As you can see, I import them to max and deep Exploration with no problems, and they appear smooth too, but in blender, it’s not smooth, and when i press the smooth button, it smoothes out a bit, and then blender brings the hammer down on it.

What am I missing here?

ps: i tried exporting from max and DeepExploration in different formats and I always have the same issue. (sometimes i get a load of duplicate and unwelded verts too)

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