As far as I know, it has not been done for Snitz yet. But you can ofcourse use other softwares like Agora Shopping Cart or osCommerce. A google search would be best..
The problem with webstores that if you find a good one you need to pay.. I know things cost money, but i'm not a rich man and besides Snitz Forums is free!! I'm looking for a good webstore with all the feature for free....