Chuck,
Post a sample file here and I will create a video to help you with the work flow. In V24 2D machining is based on wire frame. If you CAD files doesn't have any wire frame then you'll need to convert you surfaces edges to wire frame so you can select and program 2D features.
3D tool path are based on surfaces and solids. If you are working with a solid you have no issue selecting your geometry for 3D tool paths.
This video is for V25, but it should help with converting surfaces edges to wire frame.
Al DePoalo
Partner Product Manager BobCAD CAM, Inc. 866-408-3226 X147