Hi Charlie - Please use the appropriate family cab for the 6510. The links to the family cabs are below. Family Driver CABS
Using Dell image assist USB restore, when trying to add cab for E6510 I get an error message stating "E6510-WIN7-A11-19W13"Supported Models:E6510 No further details on any other supported models. The cab file I am trying to use for our E6510, is "E6510-win7-A11-19W13.CAB" 
Add driver cab not working on E6510