I am putting together an e-commerce website and will obvioulsy need a script for my shopping cart. I have downloaded a copy of Oscommerce and am playing around with that but it does require a reasonable knowledge of PHP. I have also looked at X-Cart and from some of the forum articles I have read, there seems to be a general consensus that x-cart and its smarty templates are easier to manipulate. Does anyone have experience with either of these (good and bad) or has any suggestions before I start?
Also, do using free scripts like Oscommerce have any detrimental affect on rankings with the search engines?