Using the Physgun, the bones of ragdolls can be independently. When spawned, ragdolls are limp, but with the use of different tools, they can posed.
Ragdolls can be spawned with the spawnmenu (Q), just like normal props. If you see an addon you want to add to it then click the add to collection button and done. To do this your going to need to go to the gmod workshop then find the collections tab and at the side you will see a create collection, your going to fill it all in call it what every you want then add all the addons to it.