Here's the thread chocklit was talking about.
The DWG or DXF file is a good start but you want the gcode to make things simpler- that's the actual description of how the tool needs to move, how fast it needs to go round corners etc.
I think ehawley mentioned somewhere in this thread (I read it a while back) that he was willing to share his toolpath file, so take a look on TDPRI and see if he can help you.
