After some additional searching it appears that Google’s Website Optimizer is the tool that will work. Here’s how:
1) Use page templates to assign an unique PHP page for page ‘A’ (the original page), page ‘B’ (the page being tested against), and finally an unique template for the conversion page.
2) On the templates for page ‘A’ insert the javascript next to the tag <body>.
3) Make 3 copies of footer.php and rename them footer-a.php, footer-b.php, and footer-c.php.
4) Rename the include code for footer.php on each of the templates (A, B, & C) to access the associated footer-X.php page.
5) Insert the javascript provided by Google’s Website Optimizer for footer A, B, and C(onversion) on the appropriate footer page.
When a visitor goes to the original page (‘A’) the javascript next to <body> will determine if ‘A’ or ‘B’ will be delivered. Website Optimizer then tracks the number of visitors to the conversion page–letting you know whether A or B is better at driving traffic to the conversion page.