Matt,
I've attached a .pcf file that sends the plot directly to a networked plotter or printer. You'll need to change the plotter address, plot size, and offsets to suite your situation. I actually created 3 separate mapkeys (C size, D size, & E size) based on variations of this .pcf to allow quick printing of the current sheet. You'll see that in the .pcf as well. Good luck!
Rich