New theme installation in existing eshop magento 1.9

Serious and very expirinced developer requested to install a New theme in existing eshop magento 1.9 live site. All the changes must be done in a mirroing subdomain name in order to check the full functionality of the new template with the existing data base and modules. and only when the demo miroring site operates perfect then this will be installed will to the main eshops site The live magento site is [login to view URL] and the theme is [login to view URL] The colors for the new theme will be Blue and Orange as the main [login to view URL] site and the [login to view URL] logo must be fitted in the new template. All the functionality and modules of the old template must be run also to the new template