I'm not 100% sure, to be honest, but there's no reason why they shouldn't.  So long as all body parts have standard names, they will work.  And they can be missing some, for example the buttocks, and the mags will just ignore them and continue to do what they're supposed to.  I've been good about adding support for non-standard body parts, usually on an individual request basis.  It usually just involves me carving out a pz2 file to apply so non-standard parts are represented, and only takes a few minutes to make/send.  -WTB