Customize PHP Cart w/ Split Testing codes

Hi, I'm looking for a programmer who's experienced in customizing PHP shopping carts and is familiar with conversion testing codes. There are 4 tasks: domain: [login to view URL] & [login to view URL] 1: I'm split testing my ecommerce website, so I have a [login to view URL] and www2.domain.com. I need a code implemented into my site globally to recognize if the visitor came into www or www2. When the visitor come back to my site, I need the visitor to go back to the same version of the website they came in. For example: visitor A came in www and the visitor came into www2, when the visitor comes back, I need visitor A to goto www not www2, and vice versa. 2. On the cart page of my website, I need to have my personalization options to be customized into a diff. format. Right now each personalization option are on diff. lines, I like it to be displayed in the same line with a vertical line separating them. 3. I have some codes developed by a previous programmer for some tier pricing options. If you look at the www2 version of my site, you'll see that on the catalog pages, I have some items which has the option says "Price as low as" and it displays the lowest price possible in the tier pricing, but if you goto the www version of the site, you'll not see this in the catalog pages, this is due to the diff. version of the cart, the customization was done on an older version and I can't find the coding to make this option show up again, so, I just need someone to find the coding for the customization. 4. Find the coding to change the font size of the drop down box of the personalization options in the product page. I'm pretty familiar with the cart, so I can save you sometime with directing you to the correct locations of the files. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Formatting need to be correct on all versions of IE and Firefox and Safari.