Here is a great way to install Apache/PHP/MySql/phpmyadmin on Windows.
I tried everything else and nothing worked!
I even managed to get postnuke to work this time.
be aware you still have to setup the smtp server for mail in the php.ini file (in the windows folder).
http://firepages.com.au/devindex.htm
The odd link doesn't work for updates, but you can mail me if you need them.