This can be done with a simple script file which may be run project wide. Yes, each drawing has to be opened, but AcadE does all that for you. The script I use is below. You can take this and change the printer name. Also, this does everything but actually plot the drawing. If you want the drawing to plot, change the last N to Y and delete the QSAVE command. Good luck!
(command "-plot" "y" "model" "Printer Name" "ANSI B (11.00 X 17.00 INCHES)" "" "landscape" "n" "extents" "fit" "0,0" "y"
"CTB File Name" "y" "" "n" "y" "n" "qsave")