the sample product is not stored in the Database. The sample product is displayed in the Most popular pod, do you mean to say you deleted the header for the Popular Pod?
the query to replace the popular pod header would be:
INSERT INTO `ps4_contents` (`ContentID`,`ContentGroup`,`ContentRefID`,`ContentValue`,`ContentDate`,`ContentUserID`,`ContentPageName`,`ContentPageSetParentID`,`ContentPageSetOrder`,`ContentType`,`ContentParentGroup`)
VALUES
(15, 'Popular Pod', 'Header', 'Most Popular', '2010-01-14 13:44:04', 0, NULL, NULL, NULL, 'TXT', 'Home Page');