One of the most-requested items in the forums on ScriptingAnswers.com is a way to automate FTP transfers - something more robust that simple input scripts for the built-in FTP.exe app. well, ask no more, just go to http://www.primalscript.com/freetools and download the new FTP COM object. With it, you can connect to FTP sites (providing credentials if needed) and Get and Put files using simple Get() and Put() methods. Quick, easy, and the download includes samples showing how to use it - you can even check for failed connections and transfers using status codes returned by the various methods. Free, free, free. Enjoy.
PS. Works great in VBScript, PowerShell, KiXtart, JScript - any language that supports COM. Included samples are in VBScript.
Source : The SAPIEN scripting blog