Prestashop shopping cart installation

I have an existing Web Site that has, heretofore, functioned entirely as a publisher for other Sites and an advertiser for Google. This is a content rich Site whose time has come to integrarte products. All the information and advice on the Site is related to women as the visitors. Currently we have traffic from all over the globe and somewhat of a loyal following. Beginning next week, we have a scheduled launching (July 8Th) of our first products. We had a cart in place, however, they were unable to efficiently handle the volume of products (5,700) that we have acquired. Therefore, we have switched to PrestaShop. I have patially installed Prestashop by using FileZilla to at least upload all of the Web Site and shopping cart information to FileZilla and now need to begin exporting the Shopping Cart to my Web Site. It is at this point thatam experiencing some difficulties. My host is Go Daddy and my merchant account arrangement is via Pay Pal. Go Daddy is being successfully recognized by virtue of the SQUAL setting as the Host. I have an inventory management company in place to co-ordinate the daily updates required at the shopping cart level and they must be able to log on to my cart in order to have access to this facet off my Site. Therefore my Cart must be compatible with their software and prestashop fills this bill. I can't imagine this taking more than a small amount of your time as we only need your capable hands for these finishing and completing touches. I designed the web site myself using XSitePro. I will need for you to be able to take control of my computer and work from your CPU to accomplish this task.