One thing we'd really not want everybody to know is how much information goes along with each XFA file.
What I mean, I was just browsing through a bunch of sample files that come with the program. Usually, in my experience, sample files are included to run with a tutorial. But in OnecncXP, there is enough information that you can extract by using "edit" in the NC manager, that you can practically see everything that they do to create the toolpath.
I didn't know how to use custom toolpath before, but now I see just draw a basic
2d path above your 3d surface and it machines the Z component automatically, more like a projection of the 2d path onto the surface, except you don't have to do the task of doing the projecting.
I learned this from the sample file only, I did not read the "helptease"