Installing PHP4 for PWS

Hi, I found David Fischer's step-by-step instructions at http://www.faqts.com/ for installing PWS and PHP on my local machine to be very helpful. However, I'm getting the following error when I try to access .php files: [403.1 Forbidden: Execute Access Forbidden: This error can be caused if you try to execute a CGI, ISAPI, or other executable program from a directory that does not allow programs to be executed.] I have set up my PWS manager to read/execute/script from my PHP directory and have the correct association in HKEY_LOCAL_MACHINE to the php4isapi.dll in the php/sapi/ directory. Is there any other place where I need to make the PHP directory executable? Thanks,