We use this thingy quite sucessfully...
http://www.ridetech.com/store/quickt...-22-wheel.html
David is correct...turn plates are a must. At the track we use a simple set of 18ga. metal circles with a bit of grease between them. Simple, cheap, does the job. At he shop we have a fairly expensive set of degreed turnplates. Not really better but they do save some time.
We also use the toe plates that David described above.
Don't be afraid. You can't screw it up any worse than the pimple faced kid at the Firestone store.