The sweepstakes covers customers in the U.S., Canada, Mexico and Brazil, CTNA said.

U.S. and Canadian customer buying four Continental tires between Sept. 17 and Jan. 17, 2008, will get a digital picture frame, and will be entered in the "Power of 4 Sweepstakes."

Sweepstakes prizes for U.S. customers include a customized "Fantastic Four: Rise of the Silver Surfer" 2007 Dodge Charger, complete with Continental tires and Giovanna Wheels; a custom Gibson guitar; an X-Box 360 and a prize pack; and "Fantastic Four: Rise of the Silver Surfer" DVDs.

The grand prize for Canadian customers is a home theater package, CTNA said.

CTNA is supporting the U.S. leg of the sweepstakes with POS displays at some 3,000 Continental tire dealers, magazine ads and an Internet effort.