Product configurator / webshop

I'm currently building a Joomla site for a Client. This now has to be expanded to include a product configurator / webshop module - Virtuemart has been installed but not integrated into the template ([login to view URL] is being used). The site is in Danish and the Client works in the Security Industry. The module needs to have similar functionality as one of the major players on the market (G4S - [login to view URL]) where the end user can chose a package and then add accessories, detectors etc. according to the size of the installation - this should be reflected in two prices - the one off price and the monthly fee to cover service and maintenance. Finally if the end user likes the configuration / the price, the order has to be submitted generating an email to the Client. No payment module in first step. The task is: 1. setting up Virtuemart of similar ecommerce module in Joomla and get i integrated into the current template. 2. customize the css and PHP code to work in a similar way as the link provided (G4S) without being a copycat. Different from Virtuemart standard would be the two sets of prices that has to be calculated based on the current configuraton. This could also lead to other minor template enhancements if you have Graphical skills - but this is not a qualifying factor