Ok, so I put many hours into this Post Processor and I finally got a version that works with Cut 2D/Mach 3. There are some things that need to be setup in the Cut 2D CAM but it's simple enough (see attachment).
BTW, if you're not familiar with this it uses E0P1/E0P0 to turn the laser Beam on and off. It is assigned to output 1 in Mach 3 and is set to Port1, pin17. Search Bart's blog for more information. He wrote the original article about using this with Cut 2D to implement a Laser Cutter (with manual control).
In Cut 2D, make a Laser tool (Mine's nothing more than an end mill) with a Diameter of .003". See attachment. I have also included a copy of the modified Post Processor so as to save someone else the trouble of getting this to work with Cut 2D.
P.S. Don't forget to change the extension from .txt to .pp....The file should be installed to C/:Program Data/Vectric/Cut2d/V1.5/PostP