Hi glmr, if you want to do UV mapping you might try using one of these programs to set it up:

UVMapper: http://www.uvmapper.com/
Unwrap3D: http://www.unwrap3d.com/u3d/index.aspx
Unfold3D: http://www.polygonal-design.fr/

Any of those should be able to do an unwrapping operation to set up UV mapping that would work better for you than the default UVs that MoI generates. You would probably want to export to .obj format using the "Output: Quads & Triangles" when you export out from MoI.

- Michael