make shure u copied php4ts.dll to [windows]/system32 directory and renamed php.dinst[?¿?] to php.ini
append this to your httpd.conf file (you have to change the directory name for your use) :
using as cgi-modul:
ScriptAlias /php/ "c:/php/"
AddType application/x-httpd-php .php .phtml
Action application/x-httpd-php "/php/php.exe"
using as apache-modul:
LoadModule php4_module c:/php/sapi/php4apache.dll
AddType application/x-httpd-php .php .phtml
you also can change the directroyIndex line to ... index.html index.php and so on