Copy Products & All Categories from 1 Cubecart to Another

I have a cubecart demo store [login to view URL] which has around 600 products and 40 categories installed in it at the moment. I want to export these products and categories to work with my cubecart 4 installation on domain name [login to view URL] I know it is quite simple to do this but I cant figure it out. There are a few descriptions, pictures etc that need to stay. I assume it is just a matter of copy and paste. I can provide ftp access for the winning bidder. I would also be interested in the css being edited so that I can change the colour of this store to my own.