Edit my E-Commerce Wordpress Website

I need to make some changes to our Wordpress E-Commerce site. We had a developer already try some things and he got it done but its not great. (The link to our site is www.thehealthcareco.com).

The first thing that I need done is basically to restyle the navigation menu. I'm not that happy with it at the moment. I want it to look more like the Selfridges (http://www.selfridges.com) menu with some images at the bottom. I attached a couple of mockups I made which might make it more clear.

Next, I would like to add a feature to our shopping cart so when users hover over the button, it displays whats inside their bag. Again I attached two screenshots of mockups I made which should make it clearer.

Beyond that there are bits and pieces of styling changes I need.

We are in a bit of a rush so please get back to me as soon as possible and let me know whether this is something you can work on.

Thank you.

Pujan.