Shuriken Particle Pause Stop Simulate

I'm trying to use Simulate with a Shuriken Particle System called soft snow included with Unity 4.0. I'm confused about what Simulate does. If I put in Simulate(5) in the code below it seems to speed up the snow falling. The docs say it should simulate to where t=5 would be and pause.

 function Update(){

 var snowgo=GameObject.Find("softsnow");
 var snowsystem=snowgo.GetComponent(ParticleSystem);
         snowsystem.Simulate(5);
         snowsystem.Pause();
 
     }

I'm trying to learn how to control the particles so that I can go to any time (t) of the particle simulation and only show that particular time t.