Create a Script Like Hirethings.co.nz

We are [login to view URL] We need to develop a new Script like [login to view URL] We need a script for being listed in our scripts product list Front end example :[login to view URL] With same features. Script must be easy to being installed by a customer who ll buy from us this script with a simple 1,2,3 steps (that make client able to install it simply on his server), user must be able to traslated it in a new language uploading a [login to view URL] file from admin. User must be able to replace some content pages (like about us...) and logo from admin. Script must be multilingual.