I'd suggest getting this book. Lots of neat tricks, like 2 trials. First one Trial By Written Declaration. If you lose, appeal and go to Trial De Novo and hopefully the cop won't show up. Radar is just a validation of their visual observations, so I think you're screwed if the cop shows up. And/or subpoena all the documents you're entitled to. If you don't get them, they have to dismiss the case. You might be able to appear in front of the judge and request an exception for traffic school, especially since your record is so clean. I'd try that first.
http://www.amazon.com/Fight-Your-Ticket-California-Win/dp/1413306411/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1196298704&sr=8-1