[Closed] New reactor constraint

How difficult would it be to create a new constraint for reactor (if at all possible)? What I need is a ball socket with friction. Or to make a base on something that already exists in reactor, I need a ragdoll with friction, or a hinge (wich already has friction) that would allow rotation 2 axes (instead of just one).

This is to address an issue I expressed in another post:
http://forums.cgsociety.org/showthread.php?f=6&t=690066

Thanks in advance!