Make X-cart header consistent with web-site

We're implementing the X-cart shopping cart software on our web-site. The system is installed but rather than the default headers, we would like it to look like the rest of our web-site. The main web-site uses .css and image maps for the menu navigation. We need that cut-in to X-cart. Main web-site: [login to view URL] X-cart implementation (currently turned off): [login to view URL] Besides implementation we expect documentation/instructions for later reference as the underlying software (X-cart) gets updated. X-cart experience a major plus. Please indicate projects you've completed for this application.