支持ASP不用多余的设置，只要按正确安装了IIS4或IIS5就可以了。安装PHP可以选择CGI或ISAPI方式，具体安装可以参照下面说明（摘自PHP安装包内文件install.txt)

　　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

　　To use the ISAPI module, do the following:

　　If you don't want to perform HTTP Authentication using PHP,

　　you can (and should) skip this step. Under ISAPI Filters,

　　add a new ISAPI filter. Use PHP as the filter name, and

　　supply a path to the php4isapi.dll.

　　Under 'Home Directory', click on the 'Configuration' button.

　　Add a new entry to the Application Mappings. Use the path

　　to the php4isapi.dll as the Executable, supply .php as the

　　extension, leave Method exclusions blank, and check the

　　Script engine checkbox.

　　Stop IIS completely (net stop iisadmin)

　　Start IIS again (net start w3svc)