If you use exotic 3D Modelers likes Blender, Milkshape, Wings3D, best way is to download the ogre exporter/importer plugins.
Link :
http://www.ogre3d.org/index.php?opti...arent=category
Just export as Ogre XML, and then import into OpenZone. Also note that using Ogre Viewer, you will be able to view/check your models.