Here is a start for you, it looks for a title block Da1sht so you could just create a rectang save as a block that is the size of your sheet if you dont have a title block, place it around each area, a version 2 was look at the scale of the rectang when plotting.
Code:
; Plot all titles in Modelspace
; By Big-Al
(PROMPT ".....PRINTING DRAWING TO plotter....")
(setq oldsnap (getvar "osmode"))
(setvar "osmode" 0)
(setq ss2 (ssget "x" '((0 . "INSERT")(2 . "Da1drsht")(410 . "Model"))))
(setq n (sslength ss2))
(setq index 0)
(repeat n
(setq en (ssname ss2 index))
(setq el (entget en))
(setq inspt (assoc 10 el)) ; insertion pt
(setq xmin (- (cadr inspt) 6.0))
(setq ymin (- (caddr inspt) 6.0))
(setq xymin (strcat (rtos xmin 2 1) "," (rtos ymin 2 1)))
(setq xmax (+ xmin 813.0)) ; hard coded for 813 wide 6mm offset
(setq ymax (+ ymin 566.0)) ;hard code for 566 high
(setq xymax (strcat (rtos xmax 2 1) "," (rtos ymax 2 1)))
(COMMAND "-PLOT" "Y" "" "//PRODPRN01/Design-5100"
"A3" "M" "LANDSCAPE" "N"
"W" xymin xymax "1=2" "C"
"y" "Designlaser.ctb" "Y" "" "n" "n"
"y"
)
(setq index (+ index 1))
)
(setvar "osmode" oldsnap)
(princ)