So much easier than I though it would be.
Basically, generate a new file named points.scr (this is an AutoCAD script file), that contains the following:
._LINE 0,0,0 1,2,4 2,2,4 C
Run this is AutoCAD by typing "scr" into the command prompt and selecting the points.scr file.
http://forums.autodesk.com/t5/AutoCAD-2004-2005-2006/script-to-draw-line/td-p/1219015