I had to scan in and file some old microfiche, and I wanted them in individual pages. So i wrote this script to chop up microfiche into their individual pages.
Put the plug-in into your plug-in folder, re-start GIMP (to register the plug-in) and it will be available under MyScripts.
It gives you the various options:
I have been scanning in microfiche at 4800dpi using a 6" by 4" scan area to produce 0.5GB tiff files. I then load them in gimp, crop off the excess image (the Microfiche normally has a title bar, I remove this and any other excess blank boarders). Then run Microfiche to files and end up with a directory of images of the single pages from the Microfiche
hope this is of use to you