Powershift,
There are a bunch of good threads on CC regarding CA registration. I'm in the market for a car and have spent some time searching this site trying get up to speed.
CA reg plans - TOP now, waiting for 2007 SB100
My guess is that you have two options. One is take your car through the SB1578 process (basically SB100 for an out of state car). Second option is to pass the smog test (pretty tough).
Best of luck!