Shopping carts

I was searching for a online shopping cart script that pass the payment step to Paypal. Paypal is not ideal - requiring all users to register. but it is the only one available option for our scale of operation. CCNow seems to be off-line way to often

Paypalstore essentially installed a shop for you with items for sale and templates and everything. Its layout is a bit unorthodox and there are just too many files to edit.

AccuCart seems like a nicer simpler solution. It is easy to add items to the flatfile database and it uses one template file! Essentially it calculates and passes the grand total to Paypal. As such, there is no way of the cgi knowing the progress of the payment, you have to manually confirm with Paypal of the payment! However that is not a problem, since I am yet to receive a order yet.