I only got the file find_a_doctor.php. This just calls the datagrid class that writes the datagrid as HTML.

You'll need to edit the portion that writes the HTML and add "&option=com_php&Itemid=$Itemid" to the URLs. For the forms, you can add it to the form action or as hidden inputs.

eg: <input type="hidden" name="option" value="com_php" />