If this is a new installation you should create C:\php4 and copy the files under \php4 to this directory. If you have an existing PHP installation (for example, with Apache) or intend to have one, you will need to put your php.ini file in here too. The files that are in this folder by default are PHP or PHP-GTK-related and will all need to be updated from time to time. Note that C:\php4 is the default directory and that if you install PHP-GTK anywhere else, you will need to specify the full path as your extension_dir in the copy of php.ini that is being used by PHP.

Copy the contents of \winnt\system32 to your system32 directory. On Windows NT and Windows 2000 that is C:\winnt\system32. On Windows 95/98 that can be C:\Windows\system or C:\Windows\system32, take your pick. This group of files is GTK-related and will not need to be updated until PHP-GTK2 is released.

Copy the contents of \test to the location where you want to run your scripts (e.g. C:\php4\test).