as far as i know, the game can't use preanimated models, you need to animate them useing the ATM Convertor either by building animations from upto 25 slightly altered models, or useing the wheel/turrent stuff
Done - check the downloads page for the model converter.
As Zar says, the game can't use animated file formats (yet). You have to use the model converter to build animations from individual frames, which can be .x or .3ds files. Or .atm, the game's own format.
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