There are plenty of sites on the web to get setups. One such source is my
webpage. My links page will help you to find some other sources as well.
I highly recommend Bill Cranston's page, as it has track tutorials and
replays in addition to the setups. It's URL is:
http://www.racesimcentral.net/~crankstr/
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Emory University Graduate School of Arts & Sciences
Nascar Setups Page: http://www.racesimcentral.net/~ebusch/