Oscommerce Product Page/Paypal IPN Module

Hi I am looking for someone to help me on my own private oscommerce project for 2 sites that I am working on. I am a total novice and used oscom, to create this store but have taken it as far as I can with all the contributions I have installed. I need someone to make an alteration to my ultrapics/sts template files so that: In the product info page when someone roles over the smaller boxes the main picture above changes to that picture rather than having visitors need to click on them and then the picture appearing in a new window or page. Also if the same developer could install the lightbox contrib that would be great too. Something that displays what I mean is this link [login to view URL] but I want to display different pictures of the same product rather than different products. This contribution also needs to be compatible with STS templates. The Product pages are created using sts temps. Finally I also have a problem with one site regarding the implimentation of a paypal IPN module. After exiting the paypal payment scheme I get the line 13 fatal error message and I don't know how to fix it. Thansk Thanks