Customize LiteCommerce+Website

I am a pro web designer and have a site with a LiteCommerce shopping cart for a client. There is no probalem with the homepage (attached) but I've never used LiteCommerce before and am interested in customizing the inner pages with my own layout and graphics -- I have the web design finished (see attached files) and can provide all jpgs and gifs, entire navigation (what each URL is) and answer any questions on how it should work. I think I need to purchase this module: [login to view URL] I am only interested in people who have already worked with LiteCommerce. Please state what experience you have with it. Since I am a designer myself, I can takeover once the template inner pages work. I will also need you to explain how the whole thing works so I can maintain and update the site. I will be ready in 1-2 weeks with the homepage up, the drop-down menu working and all the products in the database. Then I expect us to get the inner pages working in another 1-2 weeks after that. Thanks.