Looking for a shopping cart to implement into my site

Already has a successful but static site.

[spica42]

I have a site that is using Paypal shopping cart. I'm thinking of using world pay as another option. I also want to give my customer a choice on shipping methods. How do I implement this into my site and what shopping cart is suitible.

I do not want to rebuild my site around a new shopping cart problem like OS commence as my permalinks on my current site is very well indexed. Is there any cart that allows me to just cut and paste some code onto every page to make it work?

Thanks.

[quiet_man]

Have a look at Mals-e. Works with both PayPal and WorldPay.