Bad news... You cannot use the SB-100 certificate that was issued to the car in the previous owners name...
http://www.dmv.ca.gov/vr/spcns.htm
From the DMV website...
"What is an SPCNS Certificate of Sequence?
An SPCNS Certificate of Sequence identifies a vehicle as one for which the owner may choose emission control inspection based on the model-year of the engine used in the vehicle or the vehicle model-year. The certificate is issued by DMV Headquarters and will be mailed 7-10 working days after the application is accepted by your local DMV. The certificate must be presented to the BAR Referee Station at the time of inspection.
Per statute, only 500 certificates can be issued in a calendar year. Once the yearly allotment has been issued, applicants must wait until the following year to apply for a certificate.
SPCNS Certificates of Sequence cannot be transferred to a different vehicle or reissued in someone else's name. The seller of a vehicle must provide the buyer with the SPCNS Certificate of Sequence along with the bill of sale and any additional registration documents. In addition, fees deposited in one year cannot be held over for the next year's allocation of certificates.
Note: Due to the limited number of SPCNS Certificates of Sequence available, you may wish to submit your application for registration in person at a local DMV office. "