the more I think about it the more it seems it could work..

take the scene in PP. setup a blank plane to mask the camera so the one half of the frame is blanked out. set that as frame 1. then in frame 2, reverse the plane to mask the other side. now in theory, you get 2 PC's in the render q rendering the same image.. you just have to stitch them yourself... now, if that works, it could be expanded out to quarter or even more the image.. could be done easily with a python script.. and stitching the images together would'nt be a problem in Photoshop or Gimp...

damn it.. I wish I had PP to try this idea out with...