Missing DLLs - PHP 5.2.9-1

I'm a complete novice with PHP but have used many other languages in the past. I have also looked in a lot of places to find a solution to this but ... I'm running Win XP Pro/SP3. I have a working Apache 2.2 server running on "localhost". I installed PHP 5.2.9-1 using the .msi file from www.php.net. I installed *everything*, even overriding the defaults that would have left some things uninstalled. PHP seems to work in my web browser in that the 3-line script <?php phpinfo(); ?> displays the correct information. So, I started reading up on the stuff I'd need for the project for which I want PHP and discovered that I should be able to run it from a "cmd" command line. Doesn't work. I opened a cmd box and entered "php -v" as per the example I'd just read about. I got a slew of error messages in the cmd box and, for each message, a *modal* window complaining about a missing dll file. There are several such dlls: ntwdblib, OCI, LIBPQ, sqlite3, aspell-15 and libcs. Some of the dlls are complained about several times. Yes, PHP is in my PATH. Yes, I ran this as admin. What am I doing wrong, please? If it will help I'm happy to attach a text file into which I captured all the "cmd" error messages. If this is not the right place for this question, please point me in the right direction. -- Harold Fuchs London, England