osCommerce MULTIPLE front-end, same back-end

I have 1 store in osCommerce, one inventory, one wharehouse with personnel working for packing and email answering. I want to open a new STORE, with a different website address, different design, selling the same products with the same prices of my main store - but called with different names, a different URL, and it has to share with my main store the back-end system: the inventory, packing personnel, email answering personnel, and invoice account. To realize this I need to be able to create 1 or more extra oscommerce stores, on different domains, with different templates and store names, that only share with main store the same wharehouse and personnel. Customers must not understand that the 2 or more stores are owned by the same company selling the same products, unless they buy from both stores and compare the invoices when they receive their packages. These extra stores must share with my main store WHAT IS NEEDED TO COMPLETE THE PROJECT: I need help with only 1 thing on this project. I need to run all of the stores from 1 admin section and my issue is adding/editing/removing images from the server. The database is the same, but when you add/remove an image, this needs to happen for all sites. For example; Let's say we have to modify a image of a current product or add a new item with a new image, this new image has to be put in directory /store1/images, /store2/images/, /store3/images, etc. without having to log into each admin section or FTPing the image to their respective directories. There will only be 1 admin section! There is a OSCommerce add-on attached. I tried to get it to work, but it doesn't. Give it a try and see if you can fix it. * * * * ----> Please bid only if you have EXPERIENCE in multiple stores and can PROVIDE a working example of successful multiple stores with same back end