osCommerce design and installation

I am about to purchased a oscommerce template and need to have it installed and customized. The template needs to have the color changed and minor graphic work such as adding in my company logo and name. I want the oscommerce creloaded 6.1a, a menu component installed, possibly one or two contributions added on, SSl certificate added and pal pay/ merchant account customized to receive orders. I would like to have a copy and step by step instructions of all work done. I want to be able to reinstall it on my own in the future should the need arise.