you'll want to add the following to your DoomcConfig.cfg

bind "h" "toggle g_dragentity"
bind "j" "bindragdoll"
bind "k" "unbindragdoll"
bind "l" "saveragdolls"

"tggle g_dragentity" turn on the ability to move and manipulate your ragdolls as you spawn them on your level.

"bindragdoll" this will bind your ragdolls joints where you want them. You'll enable using dragentity, then you'll click on the portion of the body you want to move and click and drag.

"unbindragdoll" will undo all your binds you made if you screw up.

"saveragdolls" this will save the ragdoll to your level. This is why you load up your level go to where you want ot place a ragdoll and do a "spawn" (ie. spawn env_ragdoll_marine1) once you do a save it will forever be on your level.