www.wysiwygwebbuilder.com

Trying to work out the best shopping cart for my site, I currently using stiva script by jabbers and it behaves reasonably well, the reason I went for this script was it bedded into my site and didn't look like something was just tacked on. I wanna to move to another cart which offers more functions such as opencart, prestacart or anything else.

Is there a way to add these carts to an existing site? ideally I want to add it in between my existing header and footer?

Thanks

You can add third party code with the HTML object.
https://www.wysiwygwebbuilder.com/add_html.html

Thanks Pablo, not sure that will help me. I've created a shop front using prestashop, there is no way I can see where I can grab the html code.
However what appears to work is inserting a inline frame within a grid, it's also responsive. Surely that can't be it....must have a downside?

Thanks in advance

Correct, if you do not have knowledge about HTML then you can also use the inline frame.

You may find the following url helpful regarding installation.
http://doc.prestashop.com/m/mobile.action#dashboard