phptriad / apache on windows question

Hi everyone, I just downloaded phptriad, which installs apache/php/mysql/perl on a win system. Im not sure on the language, but I want to be able to define virtual directories. Currently everything under /apache/htdocs/ is accessible from the browser, ie test.php located at c:\apache\htdocs\test.php can be accessed on the browser url at http://localhost/test.php. Now if I wanted to define say the directory web located at d:\code\web so that I could type http://localhost/web/somephpfile.php in my browser how would I go about making that association. Thanks, Christian