I want to disappear added to cart message permanently after click add to cart!

[saad4s]

Hello sir,
I am using abantecart for my ecommerce business. There show added to cart message after click add to cart. I want to hide this message for permanently and never show added to cart when someone click on add to cart.
And I have one more query! I want to add one more field in checkout page like shipping date and time which is also show on invoice page.

Please help me if it possible.