Hi Dick,
Thanks for your post and the kind words about Stardraw Design 7.3.
To answer your question: in principle, yes.
More specifically, when working in a project you would choose to import the DWG and select in the import scaling dialog a scale of 1 Unit = 1 Inch and set the drawing type as Rack Layout. This creates a new Rack Layout drawing in the project.
Note that only 2D objects from the DWG will be imported; Stardraw Design 7.3 does not support 3D objects from DWG files.
Once imported you will want to set the objects in the drawing to be on the correct Layers, e.g. the front view objects should be on the Front High Detail layer.
The next step would be to select the things you want in the UDP, rightclick and choose Create User Defined Product from Selection.
When the UDP has been created, rightclick on it in the Product Browser and choose Edit Symbols. This will allow you to make any adjustments you want to the UDP symbol including moving it to the correct location relative to the insertion point (the blue cross '+' in the UDP Symbol). For racks the default insertion point should be the bottom left corner of the lowest rack slot i.e. U #1).
If you encounter any problems please feel free to email
techsupport@stardraw.com including the DWG and .S07 project files for your rack.
I hope this is helpful.