How do you activate reactor at different times on 3DS Max?

[Richards]

I am taking an animation course in school with 3DS max. I am using reactor physics and ragdolls in the animation, but, in the preview animation box there is only one box to select which frame to activate physics. I need to have the 3 ragdolls activate one at a time while the others are still being animated, but, so far, I can only get them to all "ragdoll" at the same time. Can anyone help me out here?

[Cruz]

Use multi threading concept and delay functions