No advance duplicator files, just three real flyable ships that can shot real fire in the first button mouse and in the second button mouse can drop something. I will not take credit for it, thanks to LightDemon,Votekick and blackops. Install in your addon folder into garrysmod directory. It is not for garrysmod v9 and is only adminspawnable.

Updates :
- You can now re-enter in each ship, many thanks to blackops.
- All ship have now a flying sound according his model.
- All ships have a damage sound according his model and a default drop sound.
- Added Icons for the ships, Ships in the tab entities.
- Improved Combine Dropship that drop combine mines.
- Improved Helicopter that drop cluster bomb, thanks to Stiggy.
- Improved Combine GunShip that drop combine rollermine.

If you want to make ships just follow this tutorial.
http://forums.facepunchstudios.com/showpost.php?p=12135829&postcount=27

Go here for updates and information:
http://forums.facepunchstudios.com/showthread.php?t=624229