The SS.when pigs fly is Steve's space ship that he used to get to the stars.

The ship is accessible by three force fields that keep air from flowing out.

There is also a huge magnet at the bottom of the ship to keep you on your feet.

The two sides of the ship are laden with cannons that Steve had filled with ammunition.

There is a chest of food and bottled water that Steve uses to sustain himself along with a new recruit manual that tells you about the ship and how Steve came to create his ship.

Finally, there is a secret that lies on the ship that can only been found out by downloading the map and finding it.

Additional Notes

I couldn't figure out how to upload the folder to mediafire so i had to compress it to a .RAR file.

Just extract it into your saves and it'll be fine.