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Windows NT/2000 and IIS 4 or newer and PWS 4 on NT Workstation or W2K non server editions
To install PHP on an NT/2000 Server running IIS 4 or newer, follow these instructions. You have two options to set up PHP, using the CGI binary (php.exe) or with the ISAPI module.
In either case, you need to start the Microsoft Management Console (may appear as 'Internet Services Manager', either in your Windows NT 4.0 Option Pack branch or the Control Panel=>Administrative Tools under Windows 2000). Then right click on your Web server node (this will most probably appear as 'Default Web Server'), and select 'Properties'.
If you want to use the CGI binary, do the following: Under 'Home Directory', 'Virtual Directory', or 'Directory', click on the 'Configuration' button, and then enter the App Mappings tab.
Click Add, and in the Executable box, type: c:\php\php.exe (assuming that you have unzipped PHP in c:\php\).
In the Extension box, type the file name extension you want associated with PHP scripts. Leave 'Method exclusions' blank, and check the Script engine checkbox. You may also like to check the 'check that file exists' box - for a small performance penalty, IIS (or PWS) will check that the script file exists and sort out authentication before firing up php. This means that you will get sensible 404 style error messages instead of cgi errors complaing that php did not output any data.
You must repeat from 'Click Add...' for each extension you want associated with PHP scripts. (.php is recommended. although .phtml and .php3 may be required for legacy applications.)
Set up the appropriate security. (This is done in Internet Service Manager), and if your NT Server uses NTFS file system, add execute rights for I_USR_ to the directory that contains php.exe