A gatherer stitcher for collating signatures made of paper, paperboard and the like, for stitching the collated signatures and for delivering the stitched signatures, includes a gathering section, a stitching station and a delivery station. A compressed foam block 300 substantially fills the compartment above the passageway entrance so as to leave a free space laterally adjacent to the passageway. The module has a projector for generating light images of the dynamic process images. The copy protection key is encrypted at the host receiver using a host-client pairing key shared between the host receiver and client receiver. An example use with address databases is described, including a method for converting an input address having a subject representation into an output address having a preferred representation.