
Special Edition - Install either of CBBE or BHUNP they should be all you need to get clothing and body physics for most mods. Legendary Edition - Just install BHUNP, this should get body and clothing physics for most mods SMP is based on Bullet and can handle much higher force without breaking. SMP solves a lot of the issues that PE had, spazzing mesh, inaccurate collisions etc.

What is HDT-Skinned Mesh Physics?, essentially it's a better version of HDT-Physics Extension originally developed by the lovely HydrogensaysHDT (open source now). Disclaimer: Some of these links are to LoversLab, I apologize if this offends anyone but most of the resources for SMP are only available there.
