I've finally managed to get the "blur and bump-map" script to work with Gimp's batch mode - although unfortunately I had to hard-code the color values into the script. (I'm sure it's possible to send them in as parameters, but I don't know enough scheme to get it done.)
I've put the working script up at
http://home.Online.no/~rmoldskr/Domi...blur-batch.scm
Place it in Gimp's scripts directory (~/.gimp-1.2/scripts on unix machines) and you can run it from the command line by typing
gimp-1.2 -b '(script_fu_blur_random_map_batch "./random.tga")' - Alternatively, just add this as the Last line of run_dommap.sh