available rss feed parameters:
rss_image
fieldname of image field used for rss items (default is image1)
example: shop.php?action=rss&rss_image=image2
enclosure
fieldname of enclosure field used for rss items (default is none)
example: shop.php?action=rss&enclosure=image3
enclosure field can be any field containing images or audio/video content
type=googlebase
if rss is used as input for Google Merchant Center
example: shop.php?action=rss&type=googlebase
p
specify p=0 to do hide price
example: shop.php?action=rss&p=0
b
specify b=0 to hide buy button
example: shop.php?action=rss&b=0