I frequently scan a large number of slide transparencies on a HP 5370 scanner. The slides are scanned in groups of 4 to speed up the scanning process, resulting in one image with 4 individual pictures separated by a black cross. I then individually crop each picture into an individual image for further processing. Does anybody know of a batch cropping application (preferably freeware) that can separate out the four pictures from the one image. The four images are always in exactly the same place on the scan.