Create a more responsive shopping cart?

Is there any way to change the shopping cart html from using tables to using divs? I need to make it a bit more responsive.

I've checked Themeing_MarketPress.txt and from what I understand I need to create a file called mp_cart.php. What I am not so sure about is where to go from there. In another file called template-functions.php it seems the cart is created in a function. That's leaving me at a bit of a loss.

What would be the best/easiest way to get the shopping cart to display better on smaller screens?

Thanks for your time!