I presume you are referring to Magnet ECommerce.
You might want to take a look at the FAQ's on their website.
Also, it appears that this is commercial software so I would presume that the company would provide support after you purchase the product.
Have you considered one of the open source ecommerce products such as Zen Cart or OSCommerce?
As we have not received any replies i am marking this ticket as resolved. If you have any further issues please re-open this ticket or create a new one.