The rigid-molecule, force field-based CSP approach provides useful results. Matches within the CSP results are found for all of the known Z'=1 crystal structures and, for four of the ten molecules, the predicted global energy minimum corresponds to the known crystal structure, or one of the known polymorphs. Many of the other experimentally observed crystal structures correspond to predicted structures with low numerical ranks in the energyordered sets of predictions. Therefore, this approach can act as a first stage in CSP, which provides a small set of structures for re-optimization at a higher level of theory.