VirtueMart/MySQL - PostgreSQL/CheckoutApp Database Adapter

Running CheckoutApp POS that uses PostgreSQL database ([login to view URL]) and Joomla 1.5 VirtueMart extension using MySQL ([login to view URL]). Job is, instead of duplicating databases, write a glue code that will allow the applications to use a diff database adapter if and when data is required between PosgreSQL and MySQL. A simple specs will be provided for your guidance. Host is OSX Leopard running MAMP on an Apple Mac Mini All databases (postsgresql and mysql) reside in the same mac mini Requirements: - You must be proficient with PostsgreSQL and MySQL (Joomla / VirtueMart) - Excellent in PHP 5.x.x and SQL, JavaScripts. Prefer code written as a Joomla or VirtueMart extension. Required delivery: 7 days after agreement. Specs will be provided to qualified vendors only.