Magento-multi Store (Add a store)

We have a quick small magento multi-store orientated work. The project consists of simply adding a second website/store to our existent mangeto shop so we can be able to have one admin for both shops. We are currently running one store in one domain i.e: [login to view URL] , we want to add a store in a subdomain of another domain [login to view URL] Both domains are located in the same server and we have SSH access. Our store is not running a SSL certificate. We simply want to add a new website/store to our existent one, that is it, we don't need any customization of the site or anything. This project should only take 15minutes for someone knowing magento but it is a bit confusing for me. Give us a quote and completion time, we want it to be done as soon as possible. If the project is completed promptly and efficiently we will award you bigger projects in the future.