Dave

(define (tone-change-batch pattern
                           tonefile)
 (let* ((filelist (cadr (file-glob pattern 1)))
        (dst_drawable (car (gimp-file-load RUN-NONINTERACTIVE
                                           tonefile tonefile))))
    (while filelist
      (let* ((filename (car filelist))
             (image (car (gimp-file-load RUN-NONINTERACTIVE
                                         filename filename)))
         (dst_drawable (car (gimp-image-get-active-layer image))))
         (plug-in-sample-colorize RUN-NONINTERACTIVE
                                  image dst_drawable sample_drawable
                                  TRUE TRUE TRUE TRUE 0 255 1.0 0 255)
         (gimp-file-save RUN-NONINTERACTIVE
                         image dst_drawable filename filename)
         (gimp-image-delete image)
      )
      (set! filelist (cdr filelist))
    )
 )
)