When choosing the "Add to Cart" link (Image-001) and click on "Add the Product without showing the Cart" (Image-001 again).

The system will not take you to the Cart when clicking. It will prompt you with a message:

The page at www.yourname.com says:

The Product has been added to the cart etc...

WebsiteX5 should to:

a) Allow us to change the wording: "The page at www.yourname.com says:" and

b) Allow us to change the windows properties. Put Borders, Drop shadows, change the font etc..