MMF94s and dielectric

Dear All
 Does anyone one have any references on the use of MMF94 ( with modified
 amide parameters for static minimizations, a la MMF94s as implemented in
 sybyl 6.5) for minimization of a crystal structure of a small molecule such
 as, for example, a substituted benzanilide?
 This is especially in regard to choice of dielectric function (e.g.
 distance-dependent with base diel. of 4?) to best approximate the
 solid-state electrostatic environment.
 Our interest is in seeing how different or similar the minimized xtl
 structure is to the xtl structure itself (and checking out of course that
 it's not stuck in a theoretical local minimum).
 jonathan baell