PHP Install problems

I'm trying to work my way through the "Beginning PHP5, Apache, MySql Web Development" book by Elizabeth Naramore, et. al. -- i.e. a newbie. I'm having trouble getting Apache to recognize my php code files on my HP Windows XP machine. It has service pack 2 and is current with updates. I followed the examples in the book and added a documentroot line and a directory line to the httpd.conf file. The index.html file worked witn IE7 but not with Fire Fox when I used the http://localhost URL. Next I created the second check which had me create a php testing file phptest.php in the same directory as the index.html file. Which included the following code: -- <HTML> <HEAD> <TITLE>PHP Testing</TITLE> </HEAD> <BODY> <?php echo "If this works, we <i>really<-i> did it!"; ?> </BODY> </HTML> When I used the http://localhost/phptest.php a 404 url not found message resulted. was when I unzipped the httpd-2.2.6-win32-src-r2.zip file I do not see the MSI file mentioned in Appendix I of the book. Can any one help me. RJD (bob daniels)