The Process is as follows: you will need to convert from DXF to STL with a 3rd party app like Accutrans or TurboCad first before you bring the object into the Display part Editor and convert it there to HSF. If you want to edit textures and colours the part will have to be broken down into layers so you can process each seperately and then recombine in the editor.
Wayne,
You can also install the corbel in the Cabinet and Assembly Editor. Since you are a member of the online videos, there is a video on "Installing Wood Components" listed under Display Objects.
The advantage to the Cabinet Editor is that you have the "Align" tools to place and orient the corbel or object. It is easier to view the corbel on the cabinet than in the room. Once you put the corbel on a cabinet you will also have to associate it to the cabinet. If you put the corbel on a display panel, then the display panel is saved as an assembly.