Hi,
can you tell me to which folders you copied the php4ts.dll ? Which Windows version do you use ?
Some suggestions about installing php:
1) do not use the msi installer version of php, uninstall php if you used the msi installer package, download the zip package and unzip it to e.g. c:\php (make sure that you don't use a path that contains white spaces)
2) copy php4ts.dll to \windows\system (W98/ME) or \winnt\system32 (NT/2K) or \windows\system32 (XP)
3) copy php.ini-dist to the windows/winnt folder and rename it to php.ini
4) Add the following lines to httpd.conf
LoadModule php4_module c:\php\sapi\php4apache2.dll
AddType application/x-httpd-php .php .phtml
AddType application/x-httpd-php-source .phps
That should 🙂 do it. Make sure that you use the latest versions of apache and php.