The distributed.net client, by its very nature, is already doing this. Imagine that proxy.distributed.net is the master node in a beowulf cluster comprised of thousands of PC's around the world. It divides up a task (RC5, OGR, whatever), and asks each node to complete a portion. In effect, it is the largest beowulf cluster in the world. It is pointless to try to divide the task into smaller chunks, as the distributed.net master keyserver has already done this for you.
Anyway, running 24 additional clients would undoubtedly help your stats!