Add a campus.
Add a building in the campus.
Add a floor in the building.
Add floor plan to the floor.
Is that waht you mean?
Also in relation to format of plans... Floor plan upload wizard enables direct importation of JPG/JPEG, GIF, PNG, PDF (single page only) and CAD files for floor plans. NOTE: PDF floor plans must be generated from a source file. Other PDFs, such as those scanned from a printer, will not import properly. Similarly, CAD files must be generated by AutoCAD.
Details are in the Airwave userguide which you can get from here. Check out chapter 11 starting on page 358 (all about VisualRF).