Removing Header from single product pages wp ecommerce

Hi, I’m having trouble finding where i would edit to remove my header image from my single product pages. I don’t want changes on any other pages beside the single product pages. I’ve found the HTML code to remove using firebug, but not sure how to affect my pages. doubtful it would be header.php or style.css or any other wordpress editor options i can think of. doe’s anyone know what files i would edit to do this? to stop wp-ecommerce from calling the custom header image in single product pages?

Thank you