how to create a script to copy files from a Mac OS X Leopard machine to a Windows server

I have a Mac OS X Leopard machine in my LAN.  It can browse the shares on my Windows 2003 file server.  No problem.  But what I'd like to do is create a backup script that will copy data nightly from the Mac box to the Windows server.  Let's say it was a Windows box, I'd create a simple xcopy c:\folder \\server\share and set up the file to run via scheduled tasks.  

So the first question is - can I create a script of some sort that does this?

Then the second question - can this script be modified so that it copies to a Windows server.

I get to my Windows server with Go -> Connect and then putting in CIFS:\\192.168.1.3 and then putting in my credentials and choosing the share.  Then I created an to the share that exists on the desktop.

I appreciate any and all advice.

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