you'll also probably need to go through the /etc/apache/httpd.conf file which controls most aspects of the server, including the document root, i.e the root directory that is shown when you look at
http://localhost - most of the file is well commented so you should be able to figure out what you need to do
if you want to get PHP working that is also pretty simple, just uncomment the line at the end of the httpd.conf file and it should start up fine,
also check that the following line is uncommmented in mod_php.conf
AddType application/x-httpd-php .php
BUT do not uncomment the addmodule line in the same file, it's not needed for some reason
PHP can be tested by running phpinfo() from a php file under the document root,
i.e. phpinfo.php
<?php
phpinfo()
?>
if you want mysql set up that's a little more work but drop a note back if it's needed
hope it helps
mlqds