hi, I'm looking for a recommendation for an open source shopping cart. I already have a full website designed, and want to integrate the shopping cart into the website, not the other way around as ZenCart (the only cart i've so far tried) seems to force you to do. I would greatly prefer a PHP based cart, but am willing to be flexible if someone has another suggestion that they feel would greatly fit my needs. I do need to be able to offer discounts and best sellers, and would like to be able to keep inventory. I also would like to be able to offer coupons. Thank you for any ideas!