Man, you opened two identicall threads. Moderators may scold ya.
Well but the point is to help.
In O Files Worker 3 (by Ludo):
1. Opening files in OFilesWorker is like any other program, you can open/read/write EA's .o files.
2. The main functions (most usefull and unique functions, what makes the program exactly what is needed) are Exportations and Importations, and also Previsualization of the meshes contained in the .o files.
3. When you open a .o file a list appears in the right side of the main window, containing all the parts inside the .o file. At the left side there will be the tabs "Parts" and "3D View".
4. In the tab Parts you will find other sub-tabs named "Files infos" with general information about the parts of the .o file, "Import o files" wich allows you to impor a part of another .o file, "Import oif files" wich allows you to impor a part of another .oif file, "Import 3ds files" wich allows you to impor a model edited in 3D Studio Max with exactly the same number of vertex than the .o file part, "Import 3dm files" wich in a future update will allow you to impor a model edited in Rhino 3D with exactly the same number of vertex than the .o file part, "Exportations" that allows you to export the 3D data contained in each part of the .o file to ones of the common used 3D files like .3dm, .oif, .obj and .raw.
5. The "3D Preview" tab allows you to visualize the part of the .o file. It came with his own help.