It didn't take long for the mod community to start looking into ways to put some extra features into Valve's demo for their upcoming zombie shooter Left 4 Dead. One post on the game's official message board has instructions on how to enable split-screen co-op into the demo. You will need an Xbox 360 controller to make it happen, however.

Yet another forum post has written up a way to enable people to play as one of the four zombie bosses in the demo. This won't work in multiplayer; this for single player only. However it's a preview of how the Versus mode will work in the full game where a team of human players go up against online opponents who control the boss zombies. The full game is due out on Nov. 18.

[Via Shacknews]