Yes you can. Open your NC program with a text editor. At the very top of the program type the word START all by its' self on it's own line. Save it and close. Then in Mastercam bring in the file and run it using either open or input NC file. It should generate the part for you. But keep in mind you will have to verify that your geometry is the correct size. What you will probably see is the tool path so you can offset your geometry to the inside using Mastercam. Then the geometry will be correct and you won't have to redraw it. But you still may have to edit corners to get rid of the radius there. Just use the Fillet function set on Zero Radius and pick the 2 lines to bring the corner back to sq. Hope this helps you.