Description:
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This is an issue with the Windows installer.

Using all defaults with the installer for 5.2.5 on Windows 2003 sets the IIS application map path to C:\PROGRA~1\PHP\PHP5IS~1.DLL.  IIS does not seem to like this DOS format path and returns a 404 error for every PHP page request, regardless of whether the php file exists or not.

Changing the value to "C:\Program Files\PHP\php5isapi.dll"  (including surrounding quotes) seems to resolve the issue.

Reproduce code:
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Run the Windows Installer on Windows 2003 accepting all defaults.

Expected result:
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IIS should be able to serve a simple test PHP page.

Actual result:
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IIS Displays a 404 error regardless of whether the php file exists or not.