Wag the Dog Update - Joomla

Our site - [login to view URL] is a pet care site which we are looking to update. Wag the Dog is a Gold Coast based Dog Care business. Please note that we are happy with the existing template and we are not looking for design changes. 1st stage Currently it is Joomla version 1.5 and we are looking to update this to Joomla version 2.5. We have 2 custom modules - our pet of the month which sits on the right of each page and our donations module which sits on the left of the page. These simple modules allow us to add in text or an image which is uploaded to the page. 2nd stage Incorporate a free e-commerce solution (paid for solutions may be considered) such as virtuamart or similar. The solution must have multiple payment gateway options including paypal & bank, etc. The solution must be easily editable for non-technical staff and be scalable & secure. The solution must be able to incorporate imagery, text and localized currencies. The winning freelancer must be able to demonstrate previous experience along with fixed time frames for the the work to be completed. We will provide complete access to the site for further review to the winning freelancer. A full scope will be provided to the winning freelancer.