You can download Dimmention4 SNTP Win32 client from

 http://www.thinkman.com/dimension4/download.htm:

Add your local NTS-xxxx IP address to list of available timeservers by selecting Add button. You should select SMTP protocol to be active. We also advice to keep adjustment once per minute with maximum time corrections as possible. You can use hidden tag option to run software in background. This settings is more than enough for any Windows workstation. For some server purposes you may need a bit more frequent checking. You can use this utility for all Win32 including Windows NT/2000/XP, however we advice to use another software for NT based kernels.