first update your bipd and jpt! plugins if you havent updated in a while.
1. On the bipd you want to have ragdoll check off the bitmasks "Uses Limp Body Physics", "Has No Dying Airborn", and "Random Speed Increase." It has to be all three or else ragdoll messes up.
2. Set the ragdoll timer. This will determain how long you can stay in ragdoll once triggered. So far ive seen it only go up to 5.5 before it stopped getting any longer.

3. Go to the jpt you want to trigger the ragdoll. If you want it like my SP mod then you should go to a bullet jpt, if you want to rag yourself you will choose a trigger. Show invisibles and you will see two bitmasks labled ragdoll.

Thats it, you now have ragdoll on the bipd of your choice.
Known glitches
Not SLC- for some reason this doesnt work over system link. But the lack of death animations is still a side effect so you can still ragdoll if you have a gun killl yourself instantly and have a 10 second respawn time.
"empty shell"- One glitch of ragdoll is that if you die when standing perfectly still your body wont ragdoll but float where you where untill blown away by a grenade.

up up and away- if you are ducking in mid air when you get ragdolled and let go of it it will send you flying into the air
No jmad- Sometimes if you melee someone when you are ragdolled it will force you out of it but you wont use any animations and your body will still be in the posisition it was on the ground.
vehicle freeze- if you try to ragdoll someone on a vehicle they will stand up while they are still in it and the game will freeze if they die while still in the vehicle.
floor slide- If you try to jump while in ragdoll you will end up sliding across the floor. This is also really funny to do. You can also still fire your gun while in ragdoll.