I don't think you can export DTS with that so it's useless.
Yeah you can't export .dts files, so you have to get someone else to export it for you using either Blender or Milkshape. You also need to give them the correct file type (I think .obj can be opened by both MS3D and Blender)
Plus it creates something like a million triangles in everything you make. Might was well chip in some time to learn how to use Blender.