Vicinity GIS can be used for creating vicinity maps, without the need of attaching an image to your CAD file. The models can be used for referencing Interstate, U.S., State, County and local streets and highways in addition to County limits with labels and shading into your CAD models, all on separate layers and lineweights. 

Cities, Counties & Zipcodes can be located using the Autodesk® AutoCAD® "Find" command.

Just extract the .dwg file to your preferred CAD model folder.