[phenixbb] How to model domain-wide disorder in Phenix.refine (turn off bump interactions) ?

Hi, I've got a pernicious problem where the electron density for one domain appears to extensively interpenetrate another similar domain. I'm in the process of trying to work out things like: MR solution in the wrong space group courtesy of pseudo-centering. In the meanwhile I want to model it as interpenetrating domains, and need to turn off VdeW bumps at the domain (chain) level of structure. I can't just model it as a infinite list of alternate locations. I (think) I remember how to do this in CNS (constraints interaction), but is there a way to do this in phenix ? I could not track down a particularly promising section of either the manual or the .def/eff file(s). Thanks Phil Jeffrey Princeton