322158 OScommerce MS2.2 to CRELoaded

I have an OSCommerce site running version MS2.2. I am migrating over to another Host that offers PHP5 and MYSQL5 and my site does not load any products pages, none of the category links work and the footer doesn't load. My current host is running php 4.49 and everything works perfect.. My site is heavily modified with a lot of custom mods. I need to do 1 of the following: 1. Make the site able to function 100% properly on the new host using PHP5 and MYSQL5 or 2. Convert the site exactly as is with all mods and functionality to the most recent version of oscommerce or CRELoaded that is PHP5 and MYSQL5 compliant.