231263 PHP/Ajax/Mysql Expert Needed

I have a large ecommerce site with a buying wizard on which lets the user select products from the database which is all working ok but I now want to add a feature to it. Currently the page loads, it pulls items from the database and allows them to go through a 6 page wizard with all the selected items at the end. What I now need to do based on a set of rules is filter the displayed options based on options they take. For example page 1 category 1 10 products page 1 category 2 10 products the customer on page 1, category 1, selects product 5 clicking a radio button to show it's selected, based on the backend rules category 2 item would then automatically just 4 products. If they then choose another item in category 1 depending on the rule it would then display x number of items in category 2. This needs to work on about 18 categorys split over 6 pages. All the products are in the database which is mysql so I am guessing but might be wrong this will have to be done in Ajax? Not javascript as the options must change automatically without the click of a button and the rules are stored in the database not in the php file. Depending on the item they select it then looks in the database for the rules and changes the other options. I need someone who can start this today (saturday) and finish it by sunday 9 PM GMT with testing done also. I don't want it left to the last minute so ideally start today so it can be done in good time. Programmer must be able to speak good english and be available on MSN/Yahoo. Programmer must have the skill to do this! Please DO NOT bid if you are not HIGHLY skilled. Do not bid if you cannot finish before the deadline.