PHP install on IIS with Dreamweaver on WinXP issue

Hi, I am new to PHP. I also have Dreamweaver installed on my Windows PC. I'd like to start writing some simple PHP files. I just installed IIS which is part of Windows XP. I verified that it works fine. Now when I installed PHP from the www.php.net site, it asks me what server I am using. There are 4 versions of IIS as choices. Which one do I choose ? Why is it that when I create a simple php file and place it in c:/inetpub/www, when I double-click on the file it opens Dreamweaver. How to I make it go to my IIS server and PHP application and not to Dreamweaver ? My .php file contains: <pre>&lt;p&gt;This page was created at &lt;b&gt; &lt;?php echo date(&quot;h:i:s a&quot;, time()); ?&gt; &lt;/b&gt; on the computer running PHP.&lt;/p&gt; </pre> Any help would be greatly appreciated. Thanks, Steve