Website code update cre loaded 6.2 to 6.5

We require a update on existing website [login to view URL] This website is functioning, we require some code updates to improve the usability and security of the site. We require site code to be updated from cre loaded 6.2b2b to 6.5b2b. Cre loaded is a modified version of OsCommerce. Experienced coders with cre loaded, oscommerece, & php please place a bid on this project. Only apply if you know how to update this is from cre loaded 6.2 b2b to 6.5 b2b and have extensive php code knowledge and experience. Please see attached documentation for project details.