Resolution: When installing EMS 4.4.1 on Windows 2000, error is reported as, "Error 1723. There is a problem with this Windows Installer package. A DLL required for this install to complete could not be run."
The solution is to upgrade installer on Windows 2000. http://www.microsoft.com/downloads/details.aspx?FamilyID=889482fc-5f56-4a38-b838-de776fd4138c&DisplayLang=en Download and install " WindowsInstaller-KB893803-v2-x86.exe"