Yes, the models are in 3DS form, but they aren't very great in detail. I would recommend Anim8or or another 3DS viewer, if you just wanted to view them.
As for the 3D encoding, I'll bite:
3D Anaglyph Encoding in a Nutshell:
From within your 3D program, you'll want to render 2 images:
Left and Right.
Make sure you are in a view that has perspective to it, or the 3D effect will not show quite right.
Render one picture normally. Then restrict your panning to the X axis. Pan to the left a little bit (<That's very important. The more you pan, the more depth is added. With practice, you'll get used to the right shift-per-depth)
Now render your left image.
Now use This Program:
http://www.stereoeye.jp/software/index_e.html
Just import your Left/Right images into the program, and select Color Anaglyph on the left bar.
You may want to pan the image around to correct the depth. It's best to do this while wearing 3D glasses to preview the results.
Then, just save your Pic and Viola! 3D Picture
I also have another program for taking video streams and encoding them into 3D. There are also other options than anaglyph, but it's the most common (and cheapest) and you can view an anaglyph image w/o glasses like normal.
Anyway, hope that got some juices flowing...