Hi Pozero - I have written a utility program for you that may help.

You can download it here: http://moi3d.com/download/SeparateOBJ.zip

When you unzip it, there will be a SeparateOBJ.exe program, which you can run. It will ask you for the name of an .obj file, and after you give it one it will edit the OBJ file to break larger objects up into smaller object pieces.

Please let me know if the edited OBJ file works better for you or not.

- Michael