I have php5, php6, mysql5, mysql6 on my machine running w/o any problem. I've never tried mysql4, but I think it's the same concept and it should works
Have fun,
[
test.jlbn.net] (Sample Testing Codes for PHP, MySQL, ASP.net, SQL, JSP)
[
www.jlbn.net] (Basic Guide for WAMP & Add-ons)