Just a small reminder that the Anim8or Orbiter Mesh export script will not work with the BETA versions of Anim8or.
I know some people use the BETA version because it handles textures a lot better.
I use a modified version of the export script that does a few extra things like create a batch file for BMP to DDS conversion, excludes groups from lighting effects and puts the textures in a sub-folder. The BETA file format is readable by the release version so what I do is create the model in the BETA and then export it in the release version.