How to change look and feel of shopping cart page

Hi Team,

I am have been playing around with format on MP but am now stuck,

1. I am attempting to move the check out button under the Update Cart button.

I am attempting to do this via /wp-content/plugins/marketpress/marketpress-includes/themes/icons.css but not having much luck.

2. Also attempting to remove the color of the top menu so it blend in better with my site.

3. Also want it to auto re size to full space available, i can live with the way it is but think it would look better the other way.

Need to remember this is also a mobile site so everything re sizes automatically for phone or tablet down

Site: http://rosscataldophotography.com

Any help of direction would be appreciated

Ross