The Create Single State Tool is now available at: http://www.mp2kmag.com/downloads/individual.state/

Eric

Does this utility eliminate all of the extraneous data (all I need are roads and streets) for the other states as well?

No it does not.. try it out, take it for a spin: download the Nevada test file on the page at http://www.mp2kmag.com/downloads/individual.state/
and follow the intructions.

Eric