As I uploaded the creature model anyway...you can also try it yourself in the fe:
http://www.i-modernist.com/creature.w3dput it your models folder and to let it show up as in the video adjust the irobot entry in arcades/lists/fpsdemo2.atf to:
|I, Robot|irobot|1983|Atari|||Shooter / Misc.|.36b10|Yes|mame|arcade|creature|etc.|etc.
Notice the creature entry after arcade...that will override the Irobot model showing up. Remove the model after you tried it from your models folder...
peter