AJAX Updates To ASPDOTNETStorefront Product Pages

We have currently moved from version 8 to version 9 of ASPDOTNETStorefront. We have already done all the templates and designs. However we need the AJAX from our old XML product pages to be transferred over. We have all the old code from our version 8 store and we simply need this to be put into effect on our version 9 store. The AJAX, we have three product XML packages, they are single product, single drop down and multi drop down. The single drop down has one drop down box with all the product variants. Before any is selected the drop down displays a prompt, when they select a variant the price, product code and shipping estimate all update. The same is for the multi drop down bar one feature. The multi drop down requires to user to use the first drop down, which will then populate the second drop down with the correct possible combinations. All of this code has already been done before, it is just a matter of making it work on a slightly different XML. This part of the job should really take no more than a couple of hours. The second part is we want a JavaScript function written that will snap onto the add to basket button and change its behaviour. When the add to basket button is clicked we want them to stay on the same page with an overlay covering the screen. This should show an XML package. This XML will be the upsell products for that item with tick boxes and prices. Above the upsell products should be a topic so we can easily put in promo images. Under the upsell products should be a continue to cart image and maybe a go back to product image before it. The upsell function should be like the stock upsell on product pages. We would like the JavaScript in jQuery if possible as it is already used throughout the website. We need this to be finished and fully functional before Monday 30th (May) If you are interested in this project we can supply links