Transfer data from exsisting web site to Amazon Webstore

We want to start advertising and selling on Amazon via Seller Central and Amazon storefront so we need exsisting site content from www.aroma-works.com transfering and loading through this system to get a very strong Amazon presance. Experiance of navigating Amazon Seller Central and bulk file uploading to Amazon Web Store and building a site through this system is essential.

http://webstore.amazon.co.uk/seller-central-features-Products/b/1327837031