I have been working on Blender V3O Import/Export scripts for the past few weeks and have achieved what I believe is a suitable state for beta release of the scripts.
Thanks goes to THVFD for his patience while I bugged him with all my Zmodeler2 questions.
Requires Blender v2.7
These scripts are licensed under the GNU GPL v2.0 license (http://www.gnu.org/licenses/gpl-2.0.txt).
Any use of these scripts and resulting actions is at the sole-risk of the user! I have done my best to ensure the scripts work as intended, but it's a good idea to keep back-up copies of models, textures, and any other data before use of these scripts.
Updates will be edited into this post.
Current Features and Supported Functions:
Import/Export Mesh Vertices/Faces
Import/Export Materials
Import/Export UV Mapping
Code comments! (not the best, but I'll try to keep it somewhat documented for those who'd like to help improve it or understand what I've learned about the v3o format so far)
Planned Features:
Optional rotation on export
Known Bugs:
B001 - Can't export unless the model is uv unwrapped. - Fixed
B002 - Can't export an imported .v3o model when a texture image fails to load. A texture image can fail to load when it doesn't exist in the imported .v3o file directory.
Updates
20150225233000
Fixed Bug #001
Added a ton of comments and removed some uneeded code
If y'all have any issues with the script or find any bugs, let me know here. If you are able to send me (via PM) any models/textures/.blend/.v3o files you are having issues with, I can hopefully recreate the specific bug on my end to work on a fix a little faster.
If you have any feature requests, by all means ask! I can't guarantee anything but you never know till you try.
Installation:
1. Extract the "io_mesh_v3o.zip" file.
You should have a directory called "io_mesh_v3o" with four files inside. The file names are "__init__.py", "export_v3o.py", "import_v3o.py", and "License.txt".
2. Open the "%USERPROFILE%\AppData\Roaming\Blender Foundation\Blender\2.73\" directory in Windows Explorer.
3. If it doesn't already exsist, you need to create a folder named "scripts". Inside of the scripts folder, create another folder called "addons".
4. Move the "io_mesh_v3o" folder into the "addons" directory. The four files referenced above should now be in the "%USERPROFILE%\AppData\Roaming\Blender Foundation\Blender\2.73\scripts\addons\io_mesh_v3o" folder.
5. Start Blender up, and goto "File->User Preferences".
6. In the User Preferences window, goto the "Add-ons" section and search for "v3o".
7. Enable the v3o add-on by checking the box on the far right. You can save the setting by clicking "Save User Settings".
That's it! The Import/Export options should now be available in the Blender File menu.
b2_io_mesh_v3o.zip
b2_io_mesh_v3o.zip