I've tried making some edits to the haydee model provided for 3ds max in the modding tools section, and I've exported it using the export script provided. Whenever I try and open the .dmesh files from where they are saved they flash inside the selection area for a moment, then disapear.

Edit: It seems that all I had to do to fix the problem was to convert my model to an editable poly, following what I found in the modding section.