Physics enhancement for playermodel ragdolls?

I’ve heard here and there that if you have a ragdoll rigged to Valve’s standard character rig from HL2 and the like, you can use physics from the Enhanced Citizen models to improve their posing.

However, I’ve found that said physics cannot be said for models rigged for HL2DM/GMod playermodel purposes. This disappoints me, as I’ve found a few playermodels before that I would like to use in more poses. Does anyone have more flexible ragdoll physics that can be used with the playermodel ragdolls?