Hi Metin, that's great that he has already got a solution planned for that!

It doesn't really work for MoI to save display meshes in 3DM files because it greatly increases file sizes. There's also other problems as well, see here for some previous discussion:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5325.5
http://moi3d.com/forum/index.php?webtag=MOI&msg=5875.3

- Michael